The personal library of the founder of modern neurology is open to visitors.

Historic medieval fortified city in southwest France.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

A unrivaled and rather horrifying collection of wax dermatological models.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

Ancient paintings known as the "Sistine Chapel of Cave Art."

A sweet museum focused on beets.

An old department store turned Nazi prison turned artist commune.

Tiny memorials honor individual victims of the Holocaust.

Metro station with a claim to rock n' roll fame.

Cold war icon and onetime "hole" in the iron curtain.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

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

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

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

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

Super-heavy Nazi architectural experiment.

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

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

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

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

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

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