The weathered grave of a medieval anchoress who walled herself up in a cell attached to a church.

The medieval institution is home to the precious treasure stolen in World War II in one of the greatest art thefts of the 20th century.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

An isolated dive site teeming with cnidarians.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

Every Christmas, one Arizona city makes the most of its dry climate by creating an arid desert tannenbaum.

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

Mysterious painted skulls in Moravia.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

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

In a small churchyard in Dingolfing, Germany the quaint Schusterkapelle is there to remind you of your imminent mortality.

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

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.

In 1830, cemetery workers in Cham unearthed a chamber housing thousands of skeletal remains from the 13th century, which can still be viewed today.

The mystery of the Putim Ossuary involves a tricorn hat.

These 17th-century mummies are no longer naturally preserved, but remain on display today.

A spiral staircase twists to the top of this unusual Czech lookout tower.

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

The angel of death appears to weep black tears at this grave marker.

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

Legend holds eating just one of these black eggs can add seven years to one's life.