The Yonaguni Monument, a natural formation or the Japanese Atlantis?

An underwater road considered a possible Atlantis location.

These jagged limestone blades cut out through the canopy of the jungles of Borneo.

This electric green sulphur lake in New Zealand looks like a cartoonish radioactive dump site.

Tubing through a cave lit with glowworms is a magical underground experience.

Nestled in the jungles of Vanuatu are the remains of what was once a cannibal oven.

An enormous concrete structure built over a nuclear crater.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

The atmospheric road was never meant to be so creepy.

1513 Turkish world map, full of European state secrets and snarky commentary.

This Scottish bridge seems to compel dogs to leap to their death.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A gargantuan crystal kingdom.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A Barbados crypt where it's said that the coffins refuse to stay put.

The mummified remains of Dashi-Dorzho Itigilov, Russia's most important Buddhist.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A massive underwater sinkhole made famous by Jacques Cousteau.

A number of gruesome unsolved murders have turned this simple home into a morbid tourist trap.

French commune at the heart of conspiracies.

A former ironworks that was the first UNESCO industrial site.