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

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

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

A surreal museum of extraordinary industrial objects.

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

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

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

A dead saint, a deadly poison, and a mysterious holy ooze.

A Jenga-style cylindrical tower of books that appears to go on forever.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Former military fort and site of untold horrors during WWII, this island may become the Adriatic's next luxury resort.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

One of the world's oldest olive trees, thought to be over 2,000 years old.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

The plague quarantine island home to the alleged "Vampire of Venice."

The remains of this 2nd-century Roman temple are incorporated into a modern building.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

The first Russian Orthodox church in the Catholic city of Rome in almost a thousand years.