Stranger than fiction.

Some of Stonehenge's massive stones were dragged nearly 150 miles across ancient Britain by people with no wheels, no metal tools, and no written language — and archaeologists still don't fully agree on exactly how, or precisely why.

For decades, nobody could explain how a small Polynesian society moved nearly 900 multi-ton stone statues across the island without wheels or draft animals — until researchers tried something the islanders' own oral tradition had said all along: they walked.

Somewhere in Virginia, there's supposedly millions in buried gold — and the only map is a code nobody has cracked in over 150 years.

A Minnesota farmer found a stone in 1898 claiming Vikings reached the American Midwest in 1362 — most experts call it a hoax, but it's never been fully settled.

A copper sculpture at CIA headquarters has kept codebreakers stumped for over 30 years — and the solution might get auctioned off.

Hundreds of cryptic tiles about resurrecting the dead on Jupiter have been embedded in city streets since the 1980s — and nobody's ever been caught doing it.

Enormous animal shapes carved into the Peruvian desert 1,500 years ago — only fully visible from the air.

A 2,000-year-old bronze device found in a shipwreck turned out to be more mechanically advanced than anything else built for the next 1,000 years.

A remote Pacific island has drawn over 500 documented treasure-hunting expeditions searching for a pirate fortune supposedly buried there in the 1820s — and every single one has come back empty-handed.

A single monk allegedly wrote an entire 165-pound medieval manuscript in one night to save his own life — with the devil's help, according to the legend that's followed the book for 800 years, and includes a full-page portrait of Satan drawn right into the text.

An entire ornate chamber made of gold and six tons of amber vanished during World War II — and despite decades of search expeditions, it remains one of the most valuable lost artworks in history.