The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

Mummified monks and the accidentally interred, in a 17th-century crypt.

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

A hip bar decorated with walls of golden skulls.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Haven for steampunks.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

Catacombs turned marketplace.

Thousands of well-dressed mummies below a monastery.

Half-size replica of the Taj Mahal.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

Most famous work of one of Frank Lloyd Wright's sons.

A stunning cemetery famous for its extraordinarily delicate & lifelike mourning sculptures.

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

Ghosts of France's colonial past.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

This shop specializes in oddities and Victorian-inspired wonders.

Artfully arranged bones of 5,800 Austrians.

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