This mysterious series of teeny guerrilla installations sheds a whimsical light on street art in Oakland.

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

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

Travelers exchange letters with woodland creatures at this mini post office.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

Experience a charming 1930s version of "infotainment."

A tree bears footwear on the loneliest road in America.

This beloved roadside attraction welcomes visitors with his signature neon smile.

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

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

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

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The seamy, underground secrets of Portland's criminal past.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

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

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

This massive redwood tree has a hole in the base big enough to drive through.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

An vast warehouse of everyday treasures in Berkeley, CA.