America's only nuclear missile silo open to the public.

A reproduction of earth's many biomes.

Version of the French Riviera destroyed by the sea.

Along a California highway is a kind of Jurassic Park made of metal.

The ghostly remains of an accidental sea.

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

The last Americana on Route 66.

Decommissioned experimental solar facilities that pioneered solar energy technology.

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

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

Fossils, railroads, and waterfalls!

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

"Only the devil could play golf here."

The rocks in this arid basin leave trails of movement behind them.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Every year, over 25,000 monarchs overwinter in Pacific Grove.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

The only road through the heart of Glacier National Park.

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

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

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

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.