An ancient capital city that dates back 3,000 years old and harbors many surprises.

The modern birthplace of Irish freedom.

Experience what life was like in Ireland during the Viking and medieval ages.

One of Ireland's most infamous prisons for rebels including men, women and children.

The footprint of a frustrated devil in Munich's Cathedral.

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

One of the most easily accessible examples of the rare 1960s UFO houses.

Metro station with a claim to rock n' roll fame.

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

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

Daily jousts and dancing barrel makers in Munich's mechanical clock.

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

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

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

The fairy tale castle of the "fairy-tale king."

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

A public urinal so pretty, it was declared a national monument.

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Climb inside an iron crystal magnified 165 billion times its normal size.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This beautiful, historic church looks like something out of a simpler past.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This stunning concert hall has become a symbol of Iceland's national recovery.