This fascinating museum in an old water tower holds the world's largest collection of Vodou artifacts from western and central Africa.

A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

After 400 years of being closed to the public, this monastery's underground tunnels and secret garden are now a museum.

These temples are among the oldest free-standing stone buildings in the world.

This is one of the very few intact windmills built by the Knights of St. John in the island nation of Malta.

This Soviet-era "closed town" was a top secret uranium producer often left off of maps.

Hamburgers are intensely proud of their tunnel beneath the river.

For over two centuries, this palace served as a residence for the Holy Roman Inquisition's leaders, a courthouse, and a prison.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

A centuries-old forgotten underworld lies beneath Malta.

A curious memorial to the Berlin Wall, German division, the war, and those who died at the wall.

Mysterious craters may have been home to an ancient cult.

A historic scientific breakthrough that crosses nine borders.

Rubbing the buttons along this statue's coat is considered good luck.

This stoic bronze soldier stands as a symbol of Russian sacrifice or Soviet oppression, or maybe both.

In this truly magical place, rent hasn't been raised since the year 1520.

This airport currywurst stand is made out of retro airplane parts.

A subterranean display of public art and architecture.

One of the most easily accessible examples of the rare 1960s UFO houses.

Go surfing on this urban wave, "hacked" by local surfers.

A fearsome dragon clings to a corner of Munich's city hall.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

A restaurant and observation deck built in a unique broadcasting antenna.