The first, and perhaps only, monument dedicated to Wikipedia.

This giant, 83-year-old ship elevator is an engineering feat to behold.

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

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

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

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

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

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

A century-old shot ball factory tower is open to the public once a year.

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

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

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

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.