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

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

The world's oldest known salt mine.

This abandoned Slovenian military barracks has become a punky-political art squat.

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

Boats must transform into railroad cars to navigate this Polish canal.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

This former steel and coal plant is now a neon-lit industrial fantasia.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

This unique Renaissance castle was turned into a home for Nazi occultism.

An industrial relic is now one of Europe's most staggering art spaces.

A surreal museum of extraordinary industrial objects.

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

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

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

This Communist-era residential block is one of the longest residential building in Europe.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

Living trees form the structure of an open-air palace.

One of the only spherical 19th century gas containers left today.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

An ornate century-old elevator still connects the two halves of Bad Schandau.