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

This massive redwood tree has a hole in the base big enough to drive through.

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

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

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

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Gift shop offering toe tags and chalk body beach towels tucked into a coroner's office.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

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

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

Resting place of Hollywood's immortals is also site of summer film screenings.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

A trash dump made beautiful by nature's power.

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

A 140-year-old castle with underground caves hidden in San Francisco.

World's largest collection of serial killer artwork and other macabre exhibits.

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

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.