The self-made house sculpture of an outsider artist who named himself "Chief Rolling Thunder."

A surviving concrete arrow from a 1920s navigational network is preserved right off a modern freeway.

Near the site where the English Archbishop was born, you can find an emblem in the shape of a pilgrim's badge.

A unique work of art that was created without permission.

Art Deco stylings conceal the true nature of this bridge.

This massive redwood tree has stood in Northern California for nearly 2,000 years.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

This controversial depiction of the "Founder of California" looks as though it was sculpted from mashed potatoes.

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

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

This massive solar generating facility in the Nevada desert has been plagued by difficulties.

Two craters, which probably erupted within the last 1,500 years and are now filled by alkaline lakes, represent Nevada's youngest known volcanic activity.

On October 26, 1963, a 12-kiloton nuclear device was detonated here in granite some 1,211 feet below the ground surface.

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

His discovery kicked off the Gold Rush. One of the hands on this commemorative statue points to the spot where he found the precious metal.

The meeting of the northwestern corner of Delaware, the northeastern corner of Maryland, and the southern edge of Pennsylvania.

Originally built by the Works Progress Administration, this park was recently saved from demolition.

This historic estate on the east shore of Lake Tahoe was home to an eccentric millionaire (and his pet elephant, Mingo).

Eastern zen meets Western grit in these four little trees growing out of a rock on Lake Tahoe’s Nevada shore.

Decor at “Nevada’s Oldest Thirst Parlor” includes Raquel Welch's brassiere hanging from a stuffed moose head.

A deep toxic lake fills this abandoned open-pit copper mine, now a Superfund site.

The farm where one of America's most famous folk artists created her paintings.

Home to the abandoned Tioronda Hat Works Factory, this park is a combination of woodlands and marshlands.

A picturesque example of brute-force engineering conquering nature.