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

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

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

Art and a pun, all in one.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

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

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

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

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

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

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

An eerie, derelict amusement park in Berlin.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

A sculpture of a flying hawk made from colorful car doors.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A reliquary of pop culture marvels, including the world's largest (and most terrifying) Jack-in-the-Box.

This opera house along the banks of the Connecticut River has two Tony Awards to its credit but it’s never staged a single opera.

A vast collection of rare books, manuscripts & extraordinary objects illustrating the history of medicine.

The cave where two British judges hid in exile after sentencing the king to death.

Home of Philip Johnson, one of the 20th century's most influential architects.

The kind of mixed-up place that drives archaeologists crazy.

A safe space and resource for anything and everything relating to sex and sexuality.