An abandoned 1920s-era stretch of cabins now overshadowed by the 66 Motel.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

A classically inspired temple in Redwood City.

A historic hotel in an old California railroad town with a rowdy reputation.

Where the polar bear watches over everything, and every drink is a double.

The remains of a deserted steamboat sit rusting beside an old ferry pier and an abandoned train platform.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

Each winter this underground cave forms a dazzling ice palace.

The victims of a free-floating Japanese bombing during WWII are remembered by this stone monument.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

This ancient village provides insight into the complexity of the pre-Columbian Fremont Culture.

The flow from this waterfall sometimes comes out of springs below its rim.

Deep vertical fissures like miniature slot canyons cut across the cemented volcanic rock of Black Point above Mono Lake.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

A volcanic cone that formed over 600 years ago.

This rest area is also home to a remarkable petroglyph site.

The only visible piece of San Francisco's most famous shipwreck.

California's largest steel arch bridge.

The oldest pictographs on this decorated rock formation in California's Carrizo Plain date back as many as 4,000 years.

For roadside fast food, pull over at the giant orange.

Three plaques mark the spot where the "forgotten father of broadcasting" worked.

Dozens of rockets and missiles are on display outside a testing facility in the Utah desert.

This Gold Rush ghost town was once the subject of a territorial dispute between California and Nevada.

The ruins of a military outpost from the 1860s form the centerpiece of a Nevada state park.