A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

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

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

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

An eerie, derelict amusement park in Berlin.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

One of the oldest cemeteries in Germany was originally used for victims of a cholera epidemic.

You've probably seen these distinctive orange-tiled columns on the big screen.

A science fiction-inspired apartment building designed by a famous Spanish architect.

An architect transformed this abandoned cement factory into his castle-like workshop.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

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