The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

A rancher expanding a natural spring for his cattle came up with bones – lots and lots of them.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

A glittering South Asian anomaly in a wealthy Los Angeles suburb.

This is one really big nut.

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.

Home of the International Space Hall of Fame.

A cave's rare beauty held a cavernous secret hidden underground.

Detailed sandstone carvings show an array of symbolism and adorable animals.

The largest known medieval map of the world.

The world's second-largest sundial, made entirely out of stone.

Rare collection of medieval books under lock and key.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

Sacred Indian temple that’s all monkey business.

A complex of six forts embedded in the Rajasthan hills.

Deep in the Thar desert, a temple crawling with thousands of holy rats.

Liquor and flowers mark a holy site for Indian motorcycle riders.

The largest of London's subterranean rivers and once a mad, bad center of London life.

Hear the quietest sound from across the dome.

Public access to clean drinking water was an instant hit among the masses.

An unusual round church in London with a Templar past.

The taxidermied remains of a once-great parrot.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.