A ruined hotel with an unlucky history and an eerie present.

A working miniature city designed to teach kids about safety and presumably city planning.

This 15-story mural celebrates the 50th anniversary of the musician's iconic "At Folsom Prison" album.

A fascinating and comprehensive look at the evolution of medical practice in the Sacramento Valley since the mid-1800s.

Ancient, mysterious stone altars are hidden among wild woods in central Italy.

A Roman calendar dating to the first century is tucked away in a small town alley.

A 22-million-year-old sandstone cave is a natural habitat for award-winning cheese.

The oldest orange tree in California spawned a generation of citrus farmers.

The last of a gourmet supermarket chain, this store helped spark California's Food Revolution.

The most isolated mailbox in America lets desert travelers record their passing.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

An abandoned horror film set sits eerily along a highway through Hollywood's "door to the desert."

The site of an underground detonation of a megaton nuclear bomb in the middle of the Mojave Desert.

Initially meant to immortalize the valor of the colonizer, this monument is now a symbol of Mauritanian resistance.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

A facility built in 1992 for an underground nuclear test remains in place today.

This strange hill on Old Fort Road where gravity works in reverse has been fascinating locals for years.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.