A world-class observatory in the California desert.

Oldest building in California still in use.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Few other hotels can rival the grandeur of the Castle in the Rockies.

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

Home to the deepest rift anywhere on Earth.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

See massive fossils that are over 200 million years old in northeastern Arizona.

The first declared National Monument in the United States.

Towering basalt columns, a creation of fire and ice.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

A "haunted" landmark on the coast of Southern California.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

Home to the "Circus" trees created by Axel Erlandson.

An extensive collection of ancient Egyptian artifacts and mummies.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

Raised illegally, Reggie now lives at the Los Angeles Zoo after authorities spent years tracking him down.