The ruins of one of the most important Roman villas north of the Alps.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

The 3,600-year-old archeological sensation is considered to be the oldest representation of the cosmos.

The last bastion of Roman presence north of the Alps looms over a German town.

The "Prussian Versailles" that is as glorious today as when it was built.

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

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Abandoned since 1998, this train station has become an oasis for urban explorers.

Check the time in 145 countries at once with this East German relic.

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

This monumental work of art symbolizes the coming together of a previously divided city.

This watchtower once presided over the Berlin Wall.

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

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

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

One of downtown Berlin's last reminders of its Communist past.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.