The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

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 beautiful building in the heart of Manhattan's Financial District was empty for decades.

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

Tucked in the back of this amazing antique store is an important piece of medical history.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Ming Dynasty necropolis raided during the Cultural Revolution.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Why walk on this historical site when you can zoom down instead?

Frida Kahlo's childhood home, now a museum of her life and works.

This old-school café is famous for serving coffee, chilaquiles, and the Cuban Revolution.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This statue is an ode to an iconic roadside advertisement popularized during the 1970s.

This historic folk art garden contains a nightmare tower that claims to be the world's largest concrete totem pole.

This massive library holds what was once the largest book collection in the world.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.