The remains of a ruined mansion memorialize the 1906 earthquake.

The largest permanent Monopoly board makes one of the longest games even bigger.

This ultra-modern home clings to the slope of the Hollywood Hills on a precarious stilt.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

A 300-ship graveyard, with a few still visible at low tide.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

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

Historic marionette theater features thousands of handmade puppets and free cups of ice cream.

Everyone remembers Laurie Strode from Halloween, but this is the house where most of the blood was shed.

This brightly made over hotel hides decades of suicide, serial killers, and mysterious deaths.

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

Visible below the waves are memorials to the city's Gold Rush dead.

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

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

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

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

An inconspicuous footbridge beloved by San Diego locals.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

An essential stop before plundering, BYO Cutlass.