David Sedaris called it "The greatest shop in the world."

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

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

An enigmatic modern marker left next to a historic Roman site.

Abandoned railway line circling the city of Paris.

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

Notorious artist squat renovated into legal studios.

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

A surreal statue honoring Prague's favorite literary son.

Two stunning 17th-century libraries and a cabinet of curiosities.

Microscopic scenes; some call it novelty, some call it art.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

The home of the morbid art of corpse plastination is open for visitors to view the fascinating, but stomach-churning process.

Countless grotesque faces stare out from this eerie Prague art wall.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

A former squatter's paradise outside Prague.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

This Italian foot path winds through the mountains via 52 individual tunnels.

This classic restaurant features a gorgeous mirror-clad room.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A wunderkammer of mysterious objects and stories.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A surreal museum of extraordinary industrial objects.