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

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

A famous burial ground with a history both grim and literary.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

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

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

A Victorian park cemetery, standing on the site of what was once the Great North Wood.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

A naturally mummified 2,000-year-old man.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

Remnants of a Victorian garden feature sitting in public woodland.

Rebuilt remains of a temple to Roman god Mithras.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The curios of pharmacist and collector Henry Wellcome.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

Roman-era ships unearthed...

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.