Every spring, locals see the shadowy figures of a ghost army of slain Greek soldiers descend upon this ruined fort.

This mysterious artificial cave has long puzzled New Englanders.

Unexplained bald patches in the landscape grow and recede over time, as though they are somehow alive.

Sited in an Inner Mongolian desert are the remnants of an important trade stop along the Silk Road.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

The world's longest tunnel with an undersea section.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Its tremendous toad is actually a five-story museum and viewing platform.

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

It’s said this crypt was the setting for the tragic finale of the Shakespeare play.

The world's longest outdoor escalator takes visitors to the top of China's largest dam and is also shaped like a dragon.

For centuries, this large Roman villa remained hidden thanks to the eruption that buried nearby Pompeii and Herculaneum.

The only pub in the world surrounded by an ancient stone circle.

The oldest tavern in Lowell has dedicated fans of its fan.

The oldest still-operating tavern in the United States was once owned by a pirate.

One of the city’s oldest watering holes was originally the home of a famous James Brown (not that one).

The juke joint where legendary soul artists ate, drank, and made merry.

Originally a brothel during the Klondike Gold Rush, this bar once used dolls to denote when ladies were working.

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

This pub built its reputation pouring post-shift pints for employees of the cemetery with which it shares a wall.

The wild west is still alive and well at this authentic mining town watering hole.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."