The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

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

A wunderkammer of mysterious objects and stories.

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

Super-heavy Nazi architectural experiment.

A towering monument to war, located on a beautifully peaceful hill.

Berlin's old airport.

Blitzkrieg bop your way through Berlin's Ramones Museum.

This watchtower once presided over the Berlin Wall.

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

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

This sprawling Jewish cemetery is one of the largest in Europe.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

This conical hill was built as a testing ground for an engineer known as the Glider King.

A slice of central Asia in the middle of Berlin.

This classic restaurant features a gorgeous mirror-clad room.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

Terrifying derelict military hospital once housed a recuperating Hitler.

This former Soviet military base has over 10 original aircraft and an enormous amount of memorabilia on display.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

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

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