An eerie, existential museum dedicated to the author of "The Metamorphosis."

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A floating cat sanctuary on an Amsterdam canal.

Museum preserving torture methods from the past.

This former medieval prison now unlocks Estonia’s rich photographic history.

It houses the remains of a 17th-century version of the Titanic.

Extraordinary animals sculpted from leftover junk.

Finland's northernmost zoo is home to the country's only polar bears.

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

Pigduck of Turku.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

A replica of the home of a famous fictional troll family.

Collection of nearly 500 concrete figures sculpted by the late Veijo Rönkkönen.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

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.

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

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.