At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

A brush maker used his factory to protect blind Jews from the Gestapo.

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

The original burial place of this preeminent 18th-century Jewish philosopher was razed by the Nazis.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

Inside this Jewish cemetery is a memorial to soldiers who deserted the German army and were executed.

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

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

The best bagels in Berlin are tucked away in an independent bookstore.

Where once there was a train station bathroom, there is now this German burger joint.

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

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

This obscene artwork on the side of a newspaper office pokes fun at a rival paper's former editor-in-chief.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A small hippo-shaped fountain in Berlin, Germany.

A statue of an astronomer gazes at the sky as a tribute to Caroline Herschel.

This monumental work of art symbolizes the coming together of a previously divided city.

Decades' worth of lost and forgotten objects make up the collection of this tantalizingly odd little museum.

At this airport "microcinema," you can catch a film before you catch a flight.

Keen eyes can find the Disney influences throughout this treasure trove of a tiki bar.

Experience a charming 1930s version of "infotainment."

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

These markers are used to document elevation changes around the famed dam.