Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

A Bhutanese temple gifted from the isolated Himalayan kingdom is now a surprising cultural gem located at the University of Texas at El Paso.

Search for traces of the dinosaurs that roamed here more than 90 million years ago.

This site honors the end of a 100-year boundary dispute between the United States and Mexico—all started by a river's shifting course.

A prison-like structure guards the remains of a notorious Old West outlaw.

The house's confection-like decorations are the result of one man's painstaking work over decades.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

The leathery remains of a woman who died in the 13th century now lie in a church named for her.

The skull of this patron saint is kept in a shrine located in his hometown.

The woman who helped save 15th-century France was born in this humble home.

This abandoned church dominates the landscape of a former mining boomtown.

The huge golden reliquary of a testicle-smashing saint.

The heart of a Scottish legend had a centuries-long journey before reaching its final resting place.

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

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

A saintly relic hidden in a Prague church basement.

The encased skull that is widely believed to belong to St. John the Baptist.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

The remains of the great moral philosopher reside in a university in London.

The middle finger of modernity.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

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

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