An unusual round church in London with a Templar past.

For centuries, this large Roman villa remained hidden thanks to the eruption that buried nearby Pompeii and Herculaneum.

Richard Luke Concanen never set foot on American soil.

The sacristy of this church contains remains and relics of members of the Aragonese royal family.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

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

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

A Greek tomb discovered under a palace in Naples displays ornate funeral decorations.

This medieval city gate is now a blend of the past and the modern world.

The relics of dozens of martyrs are stored in a single chapel.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

A renovated henge and stone circle just south of Stanton Harcourt village.

How did a lighthouse wind up in the middle of this landlocked German city?

The final resting place for a wealthy Roman family, this tomb might be the best preserved of its kind outside Italy.

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

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

A relic of Victorian grandeur hides beneath a busy South London road.

The wreck of a World War II cargo ship has become an unintentional time capsule at the bottom of the Red Sea.

Countless grotesque faces stare out from this eerie Prague art wall.

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

Baroque celebration of the end of the Great Plague of Vienna.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

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

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