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

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

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

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

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

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

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

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

A fascinating insight into daily life in the Eastern Bloc.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

What started as a way to address damp basement walls turned into a house filled with intricate hand-carved designs.

The remains of this misplaced church were moved here stone by stone.

A pair of gigantic baby heads greet passengers at Atocha Station.

This grand Georgian manor house was converted to serve as an isolation hospital before it was abandoned and destroyed.

This museum is dedicated solely to this millennia-old handheld cooling device.

This Underground station has been a popular filming location for decades, even before it closed.

These marks in Myddelton Passage aren't your run-of-the-mill vandalism, and they weren't made by your typical vandal.

The Great Fire of London and the regulation of one-way streets both started in this alley.

This window celebrates the role of tea, coffee, cocoa, and cotton in creating the fortune of the man who commissioned it.

This ancient oak plays host to carvings of magical elves, gnomes, witches, and other creatures prominent in local folklore.

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

This former lifeboat house now used by a funeral service was the site of a 19th-century boating tragedy.

This giant weaving shuttle celebrates Lancashire's importance during the Industrial Revolution.

This tower is all that remains of a 19th-century schoolhouse that became a famous music venue before its destruction.