Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

The fossilized remains of ancient California redwoods.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

A common entry point to the Griffith Observatory trail holds its own wonders.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A trash dump made beautiful by nature's power.