A small mountain at the crossroads of Turkey, Iraq, and Syria that some believe was the landing point of Noah's Ark.

An extravagant western hotel where every floor is the "ground floor."

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

The floor of the oldest surviving synagogue in the Americas is entirely covered in sand.

A local prank turned town icon.

Hidden in a metro shop under a shopping mall, this small museum tells the story of one of the world's largest urban transit systems.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

The remains of a enormous earthen figure of unknown origins cuts across a rural Wisconsin road.

The oldest known university in the world is in Fez, Morocco.

The explorer Captain Cook may have named it White Island, but the Maori call it Te Puia o Whakaari – The Dramatic Volcano.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

Stonehenge has nothing on Castlerigg’s views.

These 18th century gardens tell a rocky story of the son of Odysseus.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

Where America's first doomsday cult awaited the end of the world.

Unparalleled stargazing, one of Colombia's best observatories, and a swimming pool can all be found in the middle of this ancient tropical forest.

This supermarket in Shanghai appears to be a typical Chinese convenience store, but all of the bottles are empty and all the containers are filled with nothing but air.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."