Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

A 12th-century fortress containing some of Berlin's oldest buildings.

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

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

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

A church filled with the bones of hundreds of virgins martyrs—or so they say.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

"The most colorful grottoes of the world.

An intricate and amazing house built by architect Karl Junker.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

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

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

A fascinating insight into daily life in the Eastern Bloc.

A striking 12th-century-style castle built on the edge of a cliff.

Art and a pun, all in one.

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

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

An eerie, derelict amusement park in Berlin.

This historic museum is home to a rare Confederate Chester Gun.