Home to the "Circus" trees created by Axel Erlandson.

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

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

San Francisco's newly reopened hands-on science museum.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

The first declared National Monument in the United States.

Stroll through a wonderland of stupendous moss-covered trees.

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

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

An artsy hidden staircase leads to breathtaking views of San Francisco.

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