This Italian pyramid is said to hold the mingled remains of the dead from both sides of the Battle of Novara.

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

Charnel house at the foot of Mount Sinai.

5,000 skulls in memorial to those killed by the Khmer Rouge.

Mysterious painted skulls in Moravia.

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

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

The mystery of the Putim Ossuary involves a tricorn hat.

Structure built from the skulls of vanquished foes.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

A cheeky architectural easter egg.

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

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

A spherical "micro-nation" in the heart of Vienna.

Its collection includes a broad array of social, geographic, graphic design, and political history.

A faded reminder of what was once a common sight in London during the Blitz.

A plaque pays tribute to the artist's longtime London home.

The pharmacy's retro ice cream mixer is one of the last of its kind.

Large Hadron Collider and the Birthplace of World Wide Web.

A rare, flower-shaped example of Brutalist architecture in Switzerland.

These murals stand as reminders to the troubled history of this Northern Ireland city.

After surviving abandonment, this powerful Latin American mural is alive again.

A trove of ridiculously valuable prints and manuscripts under one roof.

Walk through a restaurant's refrigerator door to reach this hidden bar.