This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

A museum glorifying the life of Stalin, located in the city of his birth.

Jesus' footprints and the first catacombs in the world.

The secret room where early Bolsheviks cranked out propaganda fliers on a smuggled printing press.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.

The ship built to ferry passengers and goods to the doomed Titanic is now the last remaining White Star Line vessel.

One of the largest mechanical models of the solar system in the world.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

A mysterious demonic figure peers down from its perch within the gorgeous Chester Cathedral.

A hundred copies of Antony Gormley's naked body stare out across the water.

After mysteriously refusing to surrender at the end of World War II this sunken submarine was only salvaged in a search for Nazi gold.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

A memorial to the politician who became Great Britain's first fatality to be caused by a locomotive.

Final resting place of John Middleton "The Childe of Hale."

Giant statue of a disembodied head.

Prehistoric sandstone menhir with Early Bronze Age cup and ring markings, also known as Robin Hood's Stone.

A thousand year old oak tree survives in Liverpool.

The apartment building where JFK's assassin lived after defecting to the Soviet Union.

This Minsk museum has cat coffee, cat chess, cat art, and even a cat "staff," which visitors are free to take home.

A small museum in this border city displays the contraband art that has been stolen back from smugglers.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Nine centuries-old fortresses guard the walls of this medieval Romanian city.