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

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

A striking public sculpture representing the period of martial law in Communist Poland.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

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

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

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

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.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A collection of abandoned typographic signs from Berlin and beyond.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

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

A slice of central Asia in the middle of Berlin.