This derelict building used to house infirm Freemasons, their widows, and orphans.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

This high-perched pachyderm marks the memory of not one, but two elephants gunned down in small New England towns.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

An ancient ossuary in Rouen.

Charnel house at the foot of Mount Sinai.

Artfully arranged bones of 5,800 Austrians.

The personal charnel house of Anton Bruckner.

Mysterious painted skulls in Moravia.

Thousands of well-dressed mummies below a monastery.

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

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

This Peruvian bone silo lined with hanging human skeletons and hundreds of skulls is topped with a remarkable Michelangelo replica.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

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

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

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

The mystery of the Putim Ossuary involves a tricorn hat.

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

An Austrian house of bones filled with hundreds of intricately painted skulls.

Structure built from the skulls of vanquished foes.

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