A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

The abandoned remains of this Victorian brewery hide crumbling bowling alleys and rusting industrial gear.

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

A century-old shot ball factory tower is open to the public once a year.

The medieval institution is home to the precious treasure stolen in World War II in one of the greatest art thefts of the 20th century.

Cold war icon and onetime "hole" in the iron curtain.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

The prototype for all Nazi concentration camps.

A restaurant and observation deck built in a unique broadcasting antenna.

Berlin's old airport.

A small but immensely extravagant palace built by the "Night King."

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Where once there was a train station bathroom, there is now this German burger joint.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A 22-million-year-old sandstone cave is a natural habitat for award-winning cheese.

A cablecar-station-turned-revolving restaurant with 360-degree views of the Swiss skyline.