The Drawings That Kept Their Secret: The Nazca Lines

On 1 August 2026 a Cessna Caravan carrying sightseers over the Nazca Lines declared an emergency, lost radio contact and came down. Thirteen people died — seven Italians, two Germans, two Spaniards and both Peruvian pilots. It was the fifth fatal crash on this sightseeing run since 2008, and the death toll across those five now stands at thirty-eight.

The flight, and what has happened since

This is a desk-researched dossier; nobody from this publication has been to Nazca. It is built from UNESCO, Peru's Ministry of Culture and transport ministry, the Yamagata University Nasca Institute, peer-reviewed journals, and established news reporting.

We normally put practical matters at the end. This one leads, because the situation is twelve days old and the standard travel advice for this site is now out of date in a way that could get someone killed.

Peru's transport ministry has preventively suspended the operator, Aerodiana, pending regulatory verification and a separate accident investigation. The aircraft carried no conventional black box. The transport minister's public statement was unusually unguarded: accidents occur "sometimes from mechanical failures, sometimes from human failures and possibly from improper things. All of that is being investigated." Flights had already been suspended the previous day for winds over 40 km/h.

Then, on 3 August, Spain's foreign ministry advised its citizens to avoid Nazca overflights altogether, stating that the aircraft do not meet maintenance and safety standards equivalent to Spanish requirements. That is a national government telling its people not to take a specific tourist activity in a country it does not otherwise restrict.

The record it sits on top of, verified crash by crash:

April 2008 — five French tourists killed when an Aero Ica aircraft struck high-voltage power lines near the airfield; the pilot survived. February 2010 — seven dead, three Chileans and four Peruvians, after engine failure. October 2010 — six dead, four British tourists and two Peruvian crew, mechanical failure. February 2022 — seven dead, three Dutch, two Chilean and two Peruvian crew, the aircraft exploding on impact shortly after take-off. And August 2026 — thirteen.

Reporting around the latest crash notes allegations of lax supervision of the several dozen ageing aircraft that fly these tours. We could not establish whether other operators are still flying. That is the single most perishable fact here, and anyone considering a flight should establish it directly rather than trusting a booking page.

There is an alternative, and it is the honest one to point at. The observation tower on the Panamericana lets you see three figures from the ground for about twenty soles. It shows you less. It has never killed anybody.

AI illustration

The survey that nearly doubled the count

Now the part that makes this site genuinely exciting again, and which almost no travel coverage has caught up with.

In September 2024, a team from Yamagata University working with IBM published a survey in PNAS that added 303 new figurative geoglyphs to a corpus that had taken nearly a century to reach 430. The total is now 733.

The method deserves precision, because "AI discovers Nazca Lines" is not what happened. A convolutional neural network was trained on 406 known relief-type figures and run over 629 square kilometres of aerial imagery at ten centimetres per pixel. It proposed 47,410 candidate boxes. Human archaeologists narrowed those to 1,309, then walked the desert between September 2022 and February 2023 confirming them on foot. The hit rate was roughly one authentic geoglyph per thirty-six AI suggestions, and the whole thing took 1,200 hours of screening and 1,440 hours of fieldwork.

So the machine did not find them. The machine made it possible for people to look in the right places. Discovery ran at about 1.5 geoglyphs a year through the twentieth century, and 18.7 a year from 2004; this produced 303 in six months.

There are two completely different things out there

The survey's real intellectual payload is not the count. It is that the geoglyphs divide into two classes that differ in almost every respect, and conflating them has muddled a century of interpretation.

Line-type geoglyphs average 90 metres. About 64% depict wild animals — birds, monkeys, felines, spiders, whales. There are no humanoids and no domestic animals among them. They sit within the formal network of straight lines and trapezoids, averaging 34 metres from a geometric geoglyph, and they date to the Nasca period, especially 50 to 300 CE. The interpretation is communal: built and used at community level for ritual activity, along paths oriented toward the Cahuachi temple complex.

Relief-type geoglyphs average nine metres — a tenth of the size. And their subject matter inverts: 81.6% are human-related, with 33.8% humanoids, 32.9% decapitated heads, 14.9% domesticated camelids and only 6.9% wild animals. They cluster along informal winding trails, averaging 43 metres from a path, and they are older — Initial Nasca or earlier, before 100 BCE. The reading is individual rather than communal: objects to be viewed while walking, conveying information about human activity. Roadside signs.

One class is a cathedral. The other is signage. They were made by different people at different times for different audiences, and the fact that they share a desert is close to the least interesting thing about them.

The strongest physical evidence for ceremonial use is not visual at all — it is the smashed pottery. The line-type figures functioned as ritual places shaped like animals, where people held ceremonies that involved the deliberate destruction of pottery vessels.

AI illustration

The calendar theory is dead, and Maria Reiche deserves better than that sentence

The idea that the pampa is a vast astronomical calendar has been tested properly, and it fails.

A 2021 study in Applied Sciences built a GIS database of 2,308 straight lines and tested them against solar events — solstices, equinoxes, zenith passages — and seven bright stars across the Nasca period, correcting for Earth curvature, refraction and horizon visibility. Only 99 lines, about 4%, aligned with solar events. That is within chance. The conclusion is unambiguous: the number of hits does not justify the theory that the Nasca pampas are an astronomical calendar system. Gerald Hawkins had reached the same conclusion by 1969.

Maria Reiche spent fifty years on that hypothesis, and the cheap version of this story is that she was wrong. The 2021 team's finding is more interesting and more generous: every geoglyph alignment Reiche identified does point at the celestial body she said it did. Her measurements were sound. What failed was the generalisation — she had selected the lines that worked.

The structural problem, which the same paper notes, is that there are no comprehensive scientific publications of her results. She recorded measurements and calculations in diaries and sketches. A lifetime of accurate fieldwork was never properly published, which is its own quiet tragedy.

And her actual legacy is not theoretical at all. Reiche was a German mathematician, born in 1903, who arrived in Peru in 1932 and entered the Nazca problem in 1941. She spent decades measuring, cleaning and physically defending the pampa — chasing tourists and vehicles off the lines, fighting a government plan to run irrigation canals across them, defending the site in Peru's Congress. She lived in a hotel room beside the lines until her death in 1998, aged 95. UNESCO's own citation names her personally.

Her theory failed. Her fieldwork was accurate. Her guardianship is the reason there is still a site to argue about.

What actually threatens them

Not aliens, and not, primarily, tourists.

UNESCO's own text records that the South Pan-American Highway crosses the property directly and has damaged some lines and figures, while noting most remain in fair condition. The visible incidents are real but small: a Greenpeace banner laid beside the hummingbird during COP20 in 2014, for which the organisation apologised and the criminal case closed in 2017 without conviction; and a truck driven onto the pampa in January 2018, damaging three geoglyphs across roughly fifty by a hundred metres and leaving deep scars.

The serious threat is mining, and in 2025 it produced a genuine scandal.

On 28 May 2025 Peru's culture ministry cut the national Nasca Archaeological Reserve from 5,633 km² to 3,236 km² — removing about 2,397 km², some 42.6%, and leaving more than a hundred archaeological sites outside protection. The minister said it did not affect the World Heritage property or its buffer zone, and justified the change by two decades of archaeological study.

The objection was that the excised land is where extraction is expanding. A former vice-minister of environment put it directly: the reduction removes protections precisely where extractive activity is growing. More than 2,500 informal-miner registrations sat inside the original reserve. UNESCO said it had not been notified. A 2024 culture ministry report had named Nasca the province most affected by illegal mining in Peru.

It was reversed on 8 June 2025 — eleven days later — and the boundary is back to 5,633 km². By July, prosecutors were investigating the culture minister and three other officials over alleged offences against archaeological monuments, dereliction of duty, abuse of authority and possible bribery.

One correction worth making, because the wire copy got it badly wrong. Several international outlets described the cut as "over 1,000 hectares," or about 1,400 football pitches. The actual excision was roughly 240,000 hectares — some 240 times larger than reported. And it was the national reserve that shrank, not the 753 km² World Heritage property; those are different designations and conflating them is the other common error.

Why the Silence Index is 57

Access friction is low: four hundred kilometres of paved highway from Lima, buses from about forty-five soles, and a tower on the roadside. Footfall is substantial and concentrated on a handful of viewpoints. What lifts the score is the pampa itself — 753 km² of stone desert where the great majority of 733 figures have no visitor infrastructure at all and are reached, if at all, on foot by archaeologists. The unresolved column is unusually genuine here: after a century of work, the purpose is still argued over, and a survey in 2024 found three hundred figures nobody knew existed.

AI illustration

What they were for

The honest current answer is: ritual and procession, at two scales, for two audiences — and we are still finding the evidence.

That is less satisfying than a calendar and much less satisfying than a landing strip, but it has the advantage of being what the ground actually shows. The line-type figures sit in a network of ceremonial paths pointing toward Cahuachi, with smashed pottery in them. The relief-type figures sit beside walking trails and show people, camelids and severed heads at a size you could take in while passing.

These were not messages to the sky. They were messages to whoever was walking past — and the reason they kept their secret for so long is that we spent a century looking at them from aeroplanes, which is exactly the wrong altitude for four fifths of them.

Silence Index

57 / 100

A legacy editorial rating based on desk research. It is not an acoustic measurement or a safety rating.

Earlier and later dossiers used different fourth inputs. Individual input scores were not recorded, so these totals cannot be independently reproduced or used for precise comparisons between places.

Read the method and its limitations →

The Traveler's Panel · checked 13 August 2026

Changing information. Prices, permits, seasons and road access change, sometimes at short notice. Everything here is a starting point for your own confirmation — not a quote, and not a guarantee. Verify with the operator and the relevant official body before you book.

Overflights	Read the safety note before booking. 38 deaths since 2008; the most recent crash was 1 August 2026
Operator status	Aerodiana suspended by Peru's transport ministry. Others: unverified
Spain's advice	Avoid Nazca overflights — issued 3 August 2026
The ground option	Observation tower on the Panamericana, about 20 soles
Getting there	Bus from Lima, roughly 400 km, from about 45 soles
Best light	Early morning, before the desert haze and the wind build

Getting there — Lima → Nasca, about 400 km south on the Panamericana

1. Nasca is about 400 km south of Lima on the Panamericana, and the bus is the standard route — from roughly 45 soles, though prices are indicative and worth rechecking.
2. The observation tower stands beside the highway and shows three figures from ground level. A taxi or local bus from Nasca takes about half an hour and costs around 20 soles; organised tours combining the tower and the María Reiche museum run around 50 soles.
3. Overflights depart from María Reiche airport at Nasca. Before booking anything, establish which operators are actually cleared to fly — Aerodiana was suspended after the 1 August 2026 crash, and we could not verify the status of the others.
4. Flights are grounded in high wind. They were suspended for winds over 40 km/h the day before the August crash.
5. The Pan-American Highway crosses the property directly. Much of what you will drive past is the site.

Indicative costs — verify before booking

Bus, Lima–Nasca	From about 45 soles
Observation tower	About 20 soles, plus transport
Tower + María Reiche museum tour	About 50 soles
Overflight	Around US$90 plus roughly 77 soles in airport and ticket surcharges
Note	Prices are from a December 2022 guide and are indicative only — reconfirm locally

What to pack

• Motion sickness medication if you fly. The aircraft bank hard and repeatedly so both sides of the cabin get a view.
• Sun protection. This is one of the driest deserts on Earth and there is no shade at the tower.
• A polarising filter if you are shooting from the air — the haze over the pampa flattens everything.
• Water, and cash in soles.

Where to stay

Nasca town is small, functional and geared almost entirely to the lines — hotels and hostels at every price, most within walking distance of the airfield and the bus station. Ica, two hours north, is bigger and pairs the site with the Huacachina oasis and the vineyards. Palpa, half an hour north of Nasca, sits beside the older Paracas-era hillside figures and is far quieter than its neighbour. Most people give the whole thing a single night, which is about right for the flight and the tower and much too short for the museum and Cahuachi.

Safety & responsible travel

• Never walk on the pampa. The figures are made by removing dark surface stones to expose pale ground beneath; a single set of footprints lasts for centuries. A truck driver did visible damage across 50 by 100 metres in 2018.
• Weigh the overflight honestly. Five fatal crashes since 2008, 38 dead, one operator suspended and a European government advising its citizens not to fly. The tower shows you less and has never hurt anyone.
• Do not repeat the ancient-astronaut material, even as a joke. It has real consequences for how a living archaeological programme is funded and treated.
• Be sceptical of the calendar story too. It was tested on 2,308 lines in 2021 and produced solar alignments at the rate you would expect from chance.
• If you write or post about the 2025 boundary row, get the designations right: the national reserve was cut and restored; the World Heritage property was not touched.

Nearby, and quieter

Cahuachi, the adobe ceremonial complex about 25 km west of Nasca, is where the line-type geoglyph network appears to point, and is the most useful thing to see if you want the figures to mean something. The Chauchilla cemetery, with mummies still in situ in open tombs, lies south. The Palpa geoglyphs are older and on hillsides, which means they can be seen without an aircraft. The María Reiche museum, in the house where she lived and worked, is the site's conscience.

Getting there, in order

• 1Lima
• ↓
• 2Nasca, about 400 km south on the Panamericana

Each leg is a separate booking and a separate chance to be weathered out. Build spare days into the chain, not onto the end of it.

Where it is

Nasca and Palpa, Ica Region, Peru · 14.6900°S 75.1100°W · Open in Google Maps · OpenStreetMap

Key locations

• Mirador (observation tower), Panamericana Sur — the roadside tower that shows three figures from the ground for about 20 soles
  14.6938°S 75.1139°W
• María Reiche Neuman Aerodrome — where the overflights depart, and where the 1 August 2026 crash aircraft flew from
  14.8542°S 74.9619°W
• Nasca — the base town, about 400 km south of Lima on the Panamericana
  14.8308°S 74.9389°W
• Cahuachi — the temple complex the line-type geoglyph paths are oriented toward
  14.8186°S 75.1167°W
• Palpa — the other half of the inscribed property, and much of Yamagata's 2024 survey area
  14.5336°S 75.1856°W
• Lines and Geoglyphs of Nasca and Palpa (property centre) — the reference point UNESCO gives for the 753 km² World Heritage property
  14.7258°S 75.1486°W

Coordinates are for orientation and are accurate to roughly the width of the feature named, not to a doorway. Several of these points are inside protected areas or need a permit, a guide or a boat — read the access notes above before you plan a route to any of them.

Sources & further reading — checked 13 August 2026

1. Sakai et al. — AI-accelerated Nazca survey nearly doubles the number of known figurative geoglyphs (PNAS, September 2024). 303 new figurative geoglyphs bringing the total to 733; the 629 km² survey area at 10 cm per pixel; 47,410 AI candidate boxes narrowed to 1,309 with a 1-in-36 hit rate; 2,640 hours of human work; and the full line-type versus relief-type comparison including sizes, motif percentages, chronology and interpreted function
2. Yamagata University — press release on the 2024 PNAS survey. The institutional announcement of the survey and its methodology
3. Yamagata University — 143 new geoglyphs announced (November 2019). The earlier survey and the original two-type framework, including the finding that line-type figures were ritual places where ceremonies involved the destruction of pottery vessels
4. Richter, Teichert & Pavelka — Astronomical Investigation to Verify the Calendar Theory of the Nasca Lines (Applied Sciences, 2021). The test of 2,308 straight lines against solar events and seven bright stars, finding only 99 solar alignments — about 4%, within chance; the verbatim rejection of the calendar theory; Hawkins's 1969 conclusion; the confirmation that Reiche's individual alignments do point where she said; and the absence of comprehensive scientific publication of her results
5. UNESCO World Heritage Centre — Lines and Geoglyphs of Nasca and Palpa. Inscription in 1994 under criteria (i), (iii) and (iv); property area 75,358.47 ha; the Paracas and Nasca phases; the statement that the South Pan-American Highway crosses the property and has damaged some lines and figures; and the explicit acknowledgement of Maria Reiche's role since 1941
6. Andina — María Reiche: el legado vivo de la mujer que custodió las líneas de Nasca. Reiche's birth in 1903, arrival in Peru in 1932, the December 1941 solstice observation, and her defence of the site before Peru's Congress
7. Smithsonian Magazine — How a German mathematician took responsibility for an ancient Peruvian artifact. Reiche's entry to the problem via Paul Kosok in 1941, her chasing tourists and vehicles off the lines, and her fight against the irrigation canal plan
8. Euronews — 13 dead after Nazca Lines tourist flight crashes in Peru (August 2026). The 1 August 2026 crash of an Aerodiana Cessna Caravan: 13 dead including seven Italians, two Germans, two Spaniards and two Peruvian pilots; and the previous day's suspension of flights for winds over 40 km/h
9. El Comercio — Tragedia de Nasca: la cronología del vuelo (August 2026). The transport ministry's preventive suspension of Aerodiana, the DGAC and CIAA investigations, the transport minister's statement, and the absence of a conventional black box
10. La República — España advierte a sus ciudadanos no sobrevolar las líneas de Nasca (3 August 2026). Spain's foreign ministry advising citizens to avoid Nazca overflights, stating the aircraft do not meet maintenance and safety standards equivalent to Spanish requirements
11. Il Sole 24 Ore — The mystery of the Nazca lines: four fatal accidents in the last 18 years. The individual crash record: April 2008 (five French tourists, power lines), February 2010 (seven dead, engine failure), October 2010 (six dead including four British tourists), and February 2022 (seven dead)
12. AFP, via Malay Mail — Seven dead as tourist plane crashes near Peru's Nazca lines (February 2022). Independent confirmation of the February 2022 crash and of the October 2010 crash, and the allegations of lax supervision of the ageing aircraft used for these flights
13. Infobae — Ministerio Público investiga a ministro de Cultura por reducir protección en las Líneas de Nazca (July 2025). Resolución Viceministerial N.º 000128-2025-VMPCIC/MC of 28 May 2025 cutting the reserve from 5,633.47 km² to 3,235.94 km²; more than 100 archaeological sites left outside protection; the criminal investigation of the culture minister and three other officials; and the 2024 ministry report naming Nasca the province most affected by illegal mining in Peru
14. RPP — Ministro de Cultura anunció reducción del área de reserva de las Líneas de Nazca (May 2025). The minister's public announcement and his statement that the change does not affect the World Heritage property or its buffer zone
15. AP, via AOL — Peru reduces Nazca Lines protected area. That the rollback paves the way for informal mining and excludes zones with active or pending mining claims; the former environment vice-minister's statement that the reduction removes protections precisely where extractive activity is expanding; and UNESCO's statement that it had not been notified
16. El Comercio — El Ministerio de Cultura retrocede en la modificación de la Reserva Arqueológica de Nasca (June 2025). The reversal by Resolución Viceministerial N.º 000134-2025-VMPCIC/MC on 8 June 2025 restoring the 5,633.47 km² boundary, and the more than 2,500 informal-miner registrations inside the original reserve
17. The Art Newspaper — Peru reverses Nazca Lines site shrinking (June 2025). Independent confirmation of the reversal and the congressional interpellation filed against the culture minister
18. Greenpeace International — Nazca spokesperson trial concluded (July 2017). The December 2014 banner action beside the hummingbird geoglyph during COP20, the organisation's apology, and the closure of the case on 19 July 2017 without conviction
19. NPR — Truck driver plows over Peru's 2,000-year-old Nazca Lines, leaving deep scars (January 2018). The 27 January 2018 incursion damaging three geoglyphs across roughly 50 by 100 metres, and the judicial outcome
20. El Comercio — Cómo llegar y cuánto cuesta visitar las Líneas de Nasca. Nasca 400 km south of Lima; bus from about 45 soles; overflight around US$90 plus roughly 77 soles in surcharges; the observation tower at about 20 soles; and tower-plus-museum tours at about 50 soles. Dated December 2022 — indicative only
21. UNESCO — State of Conservation reports, Lines and Geoglyphs of Nasca and Palpa. That the most recent state of conservation report is from 2013, and that there is no 2025 or 2026 entry

Official and scientific bodies are the authority for safety, regulatory and scientific claims. Commercial operators are used only for practical detail such as tour length, meeting points and indicative pricing — never for a safety or scientific statement.