A giant 400-acre preserve in North Florida for displaced wolves.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

Europe's second largest ossuary wasn't discovered until 2001.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

An underground city of salt.

The hallucinogenic center of the ancient world.

Cat art as far as the eye can see.

Eclectic collection of dark and macabre antiques.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

A museum dedicated to the alleged Roswell Incident.

Take a drunken tour inside the world's largest known geode.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Exotic feline breeding compound and conservation center.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This shop specializes in oddities and Victorian-inspired wonders.

A curious collection dedicated to human and animal anatomy and pathology.

Shop selling 500 flavors of soda has something for everyone.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

The intriguing personal collection of a professional demon-chaser.

Natural time capsule containing an alien ecosystem.

Gift shop offering toe tags and chalk body beach towels tucked into a coroner's office.

The anatomical-pathological collection of a man who changed surgery.