The haunting ruins of Jack London's dream house.

Early prototype for Frank Lloyd Wright's Guggenheim.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

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

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

The overgrown ruins of a once thriving World War I-era copper mine.

A deserted hodgepodge of experimental structures designed by nearby university students.

The remains of a 12th-century chapter house in Golden Gate Park.

This Pringle-shaped ledge makes for the perfect photo op.

"Only the devil could play golf here."

Bonsai garden in Oakland is curated by the first non-Japanese female bonsai master in the United States.

A grove of "candelabra redwoods" deep in California's Lost Coast.

A giant donut stands as a popular symbol of Los Angeles iconography.

The liveliest ghost town in the state.

One of the most unusual geological features, recognizable from a dozen hit movies.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

Mexican food and folk art.

Hundreds of trees made from glass bottles make up this forest on Route 66.

Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

An overlooked and unassuming engineering marvel.

This “living museum” at UCLA exhibits thousands of plant species from all over the world.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

San Francisco Bay's ghost town.