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

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

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

Artfully arranged bones of 5,800 Austrians.

Mysterious painted skulls in Moravia.

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

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

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

This German bone house contains the remains of some 20,000 souls.

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

A house of bones — but nobody is quite sure to whom they belong.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

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

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

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

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

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

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

A massive, abstract lookout tower providing a panoramic view of Prague.

This Czech military museum is home to pink tank that was once a symbol of art and political rebellion.

An enormous and lavish Gothic church in Czechia.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

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

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