Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

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

This futuristic German television spire is actually the world's largest digital clock.

The monumental home of Prussia’s eccentric "Cannon King."

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

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

The world's biggest pet store.

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

No need to strap in for a “ride” on this walkable roller coaster.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A pair of giant stone heads represent the ancient Roman saints beheaded here.

The spectacular Roshen Fountain show lights up the night sky all summer long, until it "hibernates" under the ice waiting for spring to come.

Featured in one of the most iconic scenes in cinema history.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.

This derelict superstructure was a very important warning system for the Soviet military.

One of the most poignant ruins of the Chornobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

The largest catacomb system in the world.

This attraction was abandoned after the Chornobyl disaster.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

Monumental sculptures guard many of the graves, transforming this necropolis into an open-air fine art museum.

Ukraine's oldest operating pharmacy now offers guests a fascinating walk through apothecary history.

The ruins of an abandoned church loom within a picturesque Ukranian village.

Get past the gatekeeper's apartment and enter an elaborate hoax of a restaurant with a Masonic feel.