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

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

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

This German bone house contains the remains of some 20,000 souls.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

This historic stone bridge has an entire neighborhood clinging to its sides.

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

Art and a pun, all in one.

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

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

The fountain marks the area where hundreds of accused witches were burned at the stake.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.