A unique, free-floating electric ferry may be the only of its kind in Europe.

It's always summer at the beach inside this former airship hangar.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

Retirement home for giant obsolete machines.

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

A restaurant and observation deck built in a unique broadcasting antenna.

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

Puppet theater and museum holding a collection of more than 300.

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.

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

An eerie, derelict amusement park in Berlin.

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

An old department store turned Nazi prison turned artist commune.

A surreal museum of extraordinary industrial objects.

This classic restaurant features a gorgeous mirror-clad room.

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

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

A collection of abandoned typographic signs from Berlin and beyond.

The most visited, and possibly most controversial, museum in Germany.

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

A fascinating insight into daily life in the Eastern Bloc.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A slice of central Asia in the middle of Berlin.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.