A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

The metal leaves on this tree are engraved with the names of Holocaust victims.

This building has survived for more than a century and remains virtually untouched.

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

A saintly relic hidden in a Prague church basement.

This doorless 20th-century elevator doesn't stop or slow down.

An existential riddle in the world's largest ancient castle.

The abandoned remains of this Victorian brewery hide crumbling bowling alleys and rusting industrial gear.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

A Jenga-style cylindrical tower of books that appears to go on forever.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

Made famous by 'Star Wars,' these troglodyte homes face an uncertain future.

At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

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

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

The tiny, studious rodents greet visitors to the National Archives of Finland.

A small island dotted with old, historic Finnish buildings.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

An abstract monument to a symphonic composer.