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.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

An old tram depot transformed into a vintage car paradise.

The non-native bovine herd was brought in to help conserve these Berlin wetlands.

A sweet museum focused on beets.

Once a path for Jewish funeral processions, this unassuming alleyway is rich in local lore.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

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

When German-Iraqi relations broke down, this embassy was vacated post haste.

Concerts, art, offices, and a café in what used to be Berlin's first crematorium.

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

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.