The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A man-made island in scenic San Francisco Bay.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The rusting remains of the largest assembled WWII fleet on the West Coast.

The largest drain hole in the world.

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

A huge musical instrument played by the ocean.

Curiously, this large sporting goods store features 14 wax representations of American presidents.

An errant donkey ushered in a new era of mining in Nevada.

There's nothing creepier than a cemetery next to a clown motel.

Singing sand that stands as the final remains of an ancient lake.

A tree bears footwear on the loneliest road in America.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

Oh, just a motel on the edge of the desert decorated with thousands of clowns conveniently located next to an abandoned graveyard.

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

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Even in death, he's still your huckleberry.

One of few remaining antique carousels with stationary animals in the U.S.

A statue high in a hill that represents how Buffalo Bill got his name.

A wonderful collection of all things Oz is nestled in the heart of Kansas.