When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

Don't blink or you'll miss it.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Art Deco stylings conceal the true nature of this bridge.

A sculpture dedicated to Napa Valley's oldest mineral water company.

Drink a Guinness under the wings of Reagan's retired Air Force One in his presidential library.

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

An Italian restaurant became a rock-and-roll hangout and the lair of the "Hollywood vampires."

Decommissioned experimental solar facilities that pioneered solar energy technology.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

In one of the hottest parts of the Mojave Desert, shallow bedrock forces the typically dry Mojave River to the surface in this canyon, providing a vital oasis for humans and wildlife.

Built as a schoolhouse in 1914, this Mission-style building has also served as a dancehall, a library, an Army canteen, and now a cultural museum.

This Stonehenge-inspired solar calendar stands alongside a landfill, in the middle of the Nevada desert.

Mysterious meeting place for UFO hunters near Area 51.

The famous animator's private station house and man-cave was the birthplace of imagineering.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

A dazzling display of red rocks weathered into spires and hoodoos.

The set location for a 1987 cult classic draws international film buffs to the middle of the Mojave Desert.

Although he donated over 3,000 acres to Los Angles, Griffith's life was marred by controversy.

The neighborhood of Eagle Rock is named after a gigantic boulder with a shadowy surprise.

A cake-themed art installation tucked away in historic Chinatown.

The beautiful behemoth is one of the largest trees of its kind in the United States.

Hike amid the palm trees that thrive among Southern California's Indio Hills.