Odd outsider art installations surround a Gold Rush-era ghost town.

The last Americana on Route 66.

Decommissioned experimental solar facilities that pioneered solar energy technology.

While you're unlikely to find riches here these days, this remote mine is a time capsule of the Gold Rush era.

The oldest attraction in Disneyland is a prehistoric stump that Walt may have bought for his wife.

Peek inside this sandy mailbox and you'll spot kids' letters to Santa.

This outdoor observatory offers stellar views and a scale model of our solar system.

Where decommissioned airplanes and helicopters go to become part of Hollywood.

Thousands of turbines whir at the origin of North American wind power.

The world’s largest concentrated solar plant generates as many problems as megawatts.

This conservation area is also home to many of the region's desert tortoises.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

Etched into a dry lake bed, this massive directional indicator is accurate without magnets.

One of the largest fleets of armored vehicles in the world, sitting out in the California desert.

Malibu's first beach home features an astonishing trove of ceramic tiles.

In California, colorful roadside signs remind us all that love transcends borders.

A second generation sun-powered marvel lights up the night.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

This strangely vacant Western amusement seems to be an empty tribute to residents of Lucerne Valley.

This giant temperature attraction created some giant electric bills.

Where NASA's satellites and rovers phone home.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.

The decaying adobe remains of an old homestead are just off the beaten path in Joshua Tree National Park.