A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

This symbol of peace is appropriately positioned overlooking the Pacific Ocean.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

Only hotel where you can legally launder money.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

Inky sludge oozes to the surface of this beach thanks to a rare natural tar seep.

The quiet canyon has a tumultuous history involving a doomsday cult.

The cobbled together compound of a deceased artist which now serves as a filming location.

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

The state's only comprehensive museum dedicated to the mineral that defined its history and economy.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

Outsider Art Community.

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.

A Wild West jailhouse that slid down the mountainside.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

Ancient human, animal, and geometric figures drawn in the earth.

The stone-covered graves lie within the ruins of an Old West ghost town.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

The first permanent memorial to a unique secret weapon of World War II.