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

Tiny memorials honor individual victims of the Holocaust.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

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

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

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

Where once there was a train station bathroom, there is now this German burger joint.

A fascinating insight into daily life in the Eastern Bloc.

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

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

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.

An antique store houses the last operational diner from the defunct department store chain.

A hotel and restaurant serving as the mecca of kitsch.

This desert oddity hides in plain sight thanks to a cartographic error and a desert explorer with a punny sense of humor.

The hundreds of movies and television shows shot in this high desert town are commemorated in a unique museum.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

A house built from trash known as the poor man's Hearst Castle.

This tiny cluster of abandoned buildings looks like the future of the ghost town - today!

A 19th-century cabin built into a hollowed-out Sequoia tree.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.