This museum inside a museum tells the story of London's timepieces.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

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

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

An ancient tomb that still stands in Portugal.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

The mummified relic of St. Catherine sits forever on a golden throne.

A chunk of the "true cross" is held in this small Portuguese church where modern day exorcisms are said to be common place.

The naturally mummified body of a peasant girl saint.

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

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

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

Moorish signal station on a stratgic rocky outcrop.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

This remote castle was built to be a wealthy businessman's palace of vice but is now simply a historic vacation cottage.

Hidden well off the beaten path in Catalonia is this crumbling medieval castle that is slowly being covered in graffiti.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

This medieval Italian town is a sheer (and beautiful) cliffside defense.