Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

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

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

A church of bones, decorated with 40,000 human skeletons.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.

One of the oldest masonic museums in Paris.

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

Weird wax anatomical models reside here, as do other anatomical specimens.

A haunting collection of the vanished and disappearing natural world.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

A unrivaled and rather horrifying collection of wax dermatological models.

Medical museum that houses most notably the taxidermied remains of Vladimir Demikhov's famous two-headed dog experiment.