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

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.

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

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

A collection of abandoned typographic signs from Berlin and beyond.

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

An eerie, derelict amusement park in Berlin.

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

The oldest amusement park in the world has been providing a nice spot to have some fun since the 1500s.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

The remains of the oldest synagogue in Britain lay forgotten for seven centuries, hidden under a humble shop.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

One of the oldest trees in Britain may have been witness to some of the country's formative moments.

This ruined folly was originally built to honor a failed American state that would have become "Westsylvania."