The remains of 40,000 humans, meticulously stacked in a tiny churchyard shed.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

An ancient ossuary in Rouen.

Each of these hand-painted wooden boxes, which date to between the 16th and 19th centuries, contains a genuine human skull.

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

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

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

The bones of some 7,000 soldiers killed in the historic Battle of Solferino are stored here.

This small chapel is built of human bones and decorated with a golden skeleton.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

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

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

The beautiful, ornate weather station is the most popular geocache in Salzburg.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

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

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.

A controversial artwork draws attention to the dark history of Prague's "Suicide Bridge."

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

This spooky statue sits outside a famous Prague theater.

A crucified and bearded female saint.