A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

An eerie, derelict amusement park in Berlin.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

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

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

A fake Transylvanian castle houses a cathedral of antlers.

Budapest's Communist-era statues, banished to the suburbs.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.