This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

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

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

This little museum is making sure that the art and history of the graffiti sticker is not scraped from history.

Floating swimming pool within a moored vessel.

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

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

A museum dedicated to a Cold War era sausage.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

Super-heavy Nazi architectural experiment.

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

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

A collection of abandoned typographic signs from Berlin and beyond.

An old department store turned Nazi prison turned artist commune.

Started as a kitchen garden, now the second largest botanical garden in the world.

This classic restaurant features a gorgeous mirror-clad room.

A surreal museum of extraordinary industrial objects.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

Sleep in a climate-controlled plastic bubble for the night.

The largest manmade caves in Europe now function as a motorbike club's headquarters.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

A floating cat sanctuary on an Amsterdam canal.

An Anglo-Saxon cross inscribed with possibly the oldest written work of English literature.