These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

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

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

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

A brush maker used his factory to protect blind Jews from the Gestapo.

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

A haunting contrast of trains that both saved and took the lives of Jewish children in Nazi Germany.

The largest stretch of the Berlin Wall is right on top of the former SS headquarters

This watchtower once presided over the Berlin Wall.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

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

Tiny memorials honor individual victims of the Holocaust.

You've probably seen these distinctive orange-tiled columns on the big screen.

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

This platform is now a memorial dedicated to those who were deported during the Holocaust.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

A swath of France so devastated by war it is still forbidden to go there.

Site of one of World War I's most horrific scenes.

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

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

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.