Berlin's old airport.

Super-heavy Nazi architectural experiment.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

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

A fascinating insight into daily life in the Eastern Bloc.

A collection of abandoned typographic signs from Berlin and beyond.

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

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

An eerie, derelict amusement park in Berlin.

A surreal museum of extraordinary industrial objects.

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

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

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

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

100 year tradition of fist fights, marked by marble footsteps.

Go inside to really appreciate this 500-year-old technological masterpiece.

"Alleys of Stone" form natural mazes in Spanish natural park.

Avant garde house of Pierre Cardin on the Cote d’Azur.

More than 140 granite sculptures decorate the lawn of this French sculptor.

Former bridge turned into an observation tower.