Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

An eerie, derelict amusement park in Berlin.

Art and a pun, all in one.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A fascinating insight into daily life in the Eastern Bloc.

Finnish lake, and scene of an infamous murder mystery.

Villas that once served as playgrounds for the rich now fall away in decay.

A subterranean house of worship carved right out of the bedrock.

Monuments don't get much more metal than these three giant viking swords planted in a Nordic hill.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The ruins of an abandoned crematorium haunt an eerie deserted German cemetery.

A haunting deserted hotel is a favorite with artists and photographers.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

The site of the first battle of World War II.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

Less a museum than a bizarre fantasy world created by artists and engineers.

Man-made mineral caves house massive bat colony.

An abstract monument to a symphonic composer.