In July 1969, a Hungarian-Argentine adventurer named Juan Moricz walked into a notary’s office in Guayaquil, Ecuador, and filed a legal document claiming he had discovered, deep inside a cave in the Amazon jungle, a library made of gold. The metal tablets, he swore, contained a chronological account of humanity’s history stretching back 250,000 years — inscribed in a script he identified as Phoenician and cuneiform. He reported this discovery to President José María Velasco Ibarra. He never produced a single artifact as evidence.

Seven years later, the first man to walk on the moon descended into that same cave.

How those two facts connect — how a fringe theory about ancient golden books led to a major British-Ecuadorian military expedition with Neil Armstrong’s name on it — is one of the stranger stories of twentieth-century exploration. It involves a bestselling fraudster, an elderly Italian priest who couldn’t tell brass from gold, and a cave system that remains, to this day, incompletely mapped.

The Cave Itself

Cueva de los Tayos sits in the eastern foothills of the Andes, in Ecuador’s Morona-Santiago province. The name translates to “Cave of the Oilbirds” — the Shuar people, who have lived in the region for centuries, descend into the cave each spring using vine ladders to harvest fledgling oilbirds (Steatornis caripensis), known locally as tayos. The birds are a food source and a ritual object. The cave is sacred ground for the Shuar, a place they say connects the physical world to a spiritual realm.

Geologically, the cave is unusual. It’s formed in sandstone roughly 200 million years old — rare for this part of South America, where limestone karst systems dominate. The primary entrance is a vertical shaft dropping 65 meters straight down, opening into a system of spacious passages stretching at least 4.6 kilometers, with estimates of the total system reaching nearly 18 kilometers. The main chamber alone measures 90 by 240 meters — a subterranean cathedral. The vertical range spans over 200 meters, with the deepest passages ending in flooded sumps that have never been fully explored.

And here is where things get interesting for the conspiracy-minded: the sandstone produces formations with unnervingly straight edges, flat walls, and sharp right angles. There is a passage known as the “Moricz Portal” that looks, to an untrained eye, engineered. Squared-off. Intentional. A 2012 Polish expedition led by Yoris Jarzynski concluded definitively that these features are entirely natural — products of how sandstone fractures and weathers. But if you’re already primed to see the hand of an ancient civilization, those walls will speak to you.

Moricz and the Myth

Juan Moricz — born János Móricz in Hungary — was not a geologist or archaeologist. He was, by most accounts, an ideologically driven autodidact who believed that South America was the cultural birthplace of humanity and that the ancient Magyars had migrated there from Eastern Europe via a lost Pacific continent. His essay El Origen Americano de Pueblos Europeos argued that indigenous South American languages shared root words with ancient Hungarian. These claims have been dismissed by linguists and historians as hyperdiffusionist fantasy — a search, as one critic put it, for a “long-lost white race in the Americas.”

But Moricz was charismatic, and he was persistent. After filing his 1969 notarial deed in Guayaquil — declaring the discovery of “valuable objects of great cultural and historical value, consisting especially of metal sheets that probably contained the summary of the history of an extinguished civilization” — he began courting journalists and adventurers. He described a polished stone desk surrounded by enormous golden books. He said the cave contained proof that everything we knew about human origins was wrong.

He never specified exactly where in the cave system these objects were located. He demanded payment from anyone who wanted to verify his claims. No one ever did verify them. Not because they didn’t try, but because there was nothing there to verify.

Von Däniken Enters the Chat

What Moricz lacked in evidence, Erich von Däniken supplied in salesmanship.

In 1972, von Däniken published The Gold of the Gods, in which he described, in vivid first-person detail, an expedition into Cueva de los Tayos guided by Moricz himself. He reported walking through man-made tunnels, seeing mounds of gold, encountering strange statues, and standing before a library of metal tablets — all evidence, naturally, of ancient extraterrestrial visitors.

The book was a worldwide bestseller. It was also largely fabricated.

When the German magazine Der Spiegel contacted Moricz for comment, Moricz denied that any joint expedition had taken place. The descriptions came from “a long conversation,” he said, and the photographs in the book had been “fiddled.” Von Däniken first tried to defend his account, then admitted he had “embellished some aspects to make it more interesting.” Eventually, he conceded that he had never actually entered Cueva de los Tayos at all.

The photographs of gold artifacts in the book? Those came primarily from a different source entirely — the collection of an Italian Salesian priest named Carlo Crespi, who lived in Cuenca, Ecuador. And that collection has its own tangled history.

Father Crespi’s Cabinet of Curiosities

Father Carlo Crespi Croci arrived in Ecuador in 1923 to do missionary work among indigenous communities. Over the following decades, local people brought him gifts — clay objects, metal plates with inscriptions and drawings, ceramics, statues — allegedly found in subterranean caves. Unable to pay their parish priest in cash, they paid in artifacts. Or what they said were artifacts.

By mid-century, Crespi’s collection had grown to over 50,000 pieces. With Vatican permission, he opened a museum at the Salesian School in Cuenca. The collection included tablets, doors, weapons, jewelry, ceramics, and plates made of what Crespi believed to be gold, silver, and bronze, many inscribed with symbols he compared to Sumerian and Phoenician writing. Some objects depicted figures that true believers interpreted as evidence of contact between Old World and New World civilizations — or between humans and extraterrestrials.

In July 1962, a fire destroyed much of the museum. Some artifacts survived. When Crespi died in 1982, the Central Bank of Ecuador purchased the remaining collection and stored it in museum vaults. But when investigators examined the holdings, they found figurines, ceremonial seats, weapons, ceramics, and shrunken heads — no metallic plates. The gold carvings and hieroglyphic tablets photographed and filmed in the 1970s were simply gone. One investigation suggested the Church of María Auxiliadora, where Crespi had worked, sold the missing items to the Ecuadorian military. This has never been confirmed.

The more prosaic explanation: many of the objects were fakes. Archaeologists who examined the collection noted that the elderly priest apparently could not distinguish tin from silver or brass from gold. The “Sumerian inscriptions” were likely scratched onto cheap metal by locals who understood what the padre wanted to see. As one archaeologist told Der Spiegel, they were “brass imitations sold locally as tourist souvenirs.”

Still — “many” is not “all.” The Crespi collection has never been fully catalogued or publicly exhibited. What’s actually in those bank vaults remains unclear.

The 1976 Expedition

This is the part of the story that stubbornly resists easy dismissal.

In 1976, Stan Hall — a Scottish civil engineer from Dunbar — organized a major expedition to Cueva de los Tayos. It was co-financed by the governments of Ecuador and the United Kingdom. The team included over 100 participants: 62 British and 40 Ecuadorian members, among them professional speleologists, zoologists, botanists, geologists, British special forces personnel, and a film crew. The Ecuadorian Army cleared a landing zone near the cave and deployed ten transport vehicles, three planes, a small aircraft, and two helicopters across 42 trips to move 45 tons of equipment and provisions into the jungle. Eight experienced British cavers conducted a systematic survey and produced the first detailed map of the system.

The expedition lasted roughly four weeks. It was, by any measure, a serious undertaking — the kind of thing that doesn’t happen because one eccentric filed a notarial deed in Guayaquil.

And the honorary president of the expedition was Neil Armstrong.

Why? Why would the first man on the moon lend his name to a cave search prompted by gold-library claims from a Hungarian fringe theorist and amplified by a Swiss author who admitted to making things up?

Armstrong never gave a detailed public explanation. He was invited by the Ecuadorian government and by Hall, and he accepted. He descended into the cave. He participated in the expedition’s work. And then he largely declined to discuss it afterward, much as he declined to discuss most things — Armstrong was famously, almost pathologically private.

The expedition found no metallic library. No golden tablets. No artificial tunnels. No evidence of a lost advanced civilization.

What it did find was scientifically significant: 40 previously unknown species of bat, 100 new species of butterfly, 200 new species of beetle, and human burial sites containing remains and artifacts dating to approximately 1500 BCE — with some analyses pushing the date back as far as 3500 BCE. The scientists recommended the Tayos region be designated a National Conservation Area. The cave was confirmed as a site of genuine pre-Columbian human activity, possibly connected to the Upano culture, though the archaeological work was limited and has never been followed up with the rigor it deserves.

Stan Hall wrote a book about it — Tayos Gold: The Archives of Atlantis — published posthumously after his death in 2008. His daughter, Eileen Hall, has continued advocating for further exploration.

What Remains

The easy version of this story goes like this: a crank made a wild claim, a fraud turned it into a bestseller, a real expedition proved it was all nonsense.

But that version skips over too much.

It skips over the fact that a legitimate, well-funded, government-backed expedition was organized in the first place — and that the participants included people who had no reason to waste their time on a hoax. It skips over the burial sites, which confirm that someone was using this cave system thousands of years ago and that we still don’t fully understand who or why. It skips over the Shuar, whose oral traditions about the cave predate European contact and whose knowledge of the system remains deeper than any expedition’s. It skips over the Crespi collection, parts of which are genuinely unaccounted for.

And it skips over the cave itself — only a fraction of which has been thoroughly mapped. The 2012 Polish expedition confirmed the natural origin of the formations, but it also confirmed how much territory remains unexplored. Passages flood. Shafts descend into darkness. The system may extend far beyond what anyone has measured.

None of this means there is a golden library waiting in the dark. The balance of evidence strongly suggests there isn’t. Moricz never produced a shred of physical proof. Von Däniken fabricated his account. Crespi’s collection appears to have been significantly contaminated by fakes. The geological explanations for the cave’s “architectural” features are convincing.

But the cave is real. The archaeology is real and understudied. The biodiversity is extraordinary and still being catalogued. The Shuar traditions are rich and largely unrecorded in academic literature. And the question of why this particular cave — remote, difficult to access, deep in the Amazon — attracted the attention and resources it did remains genuinely puzzling.

In 2021, Will Smith descended into the cave for National Geographic’s Welcome to Earth series, produced by Darren Aronofsky. In 2018, Josh Gates explored it for Expedition Unknown, accompanied by Eileen Hall and Shuar guides. The cave keeps drawing people. Not the fringe theorists alone — serious people, with cameras and funding and institutional backing.

The Unsettled Question

There is a tendency, when debunking extraordinary claims, to declare the matter closed. The metallic library doesn’t exist; case shut. But the cave doesn’t care about our narratives. It sits there in the Ecuadorian jungle, 65 meters below the surface, with kilometers of unmapped passages and burial sites that no archaeologist has properly excavated since 1976.

The real question isn’t whether Juan Moricz found a golden library. He almost certainly didn’t. The real question is why we’ve allowed the spectacle of the hoax to overshadow the genuine mysteries the cave contains — and why, half a century after Neil Armstrong climbed back out of that shaft, no one has gone back to do the slow, unglamorous archaeological work that the site actually demands.