The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

The remains of the great moral philosopher reside in a university in London.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.

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

Macabre astrological automaton clock dating to the late 1400s.

A church of bones, decorated with 40,000 human skeletons.

This massive subterranean fissure is known as the "underground Grand Canyon."

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Museum dedicated to the terror regimes of Hungary.

Once the home of a hermetic monk, this cave now houses a small church.