Guns that have been defending San Francisco since 1904.

An artificial crater field that trained astronauts for lunar exploration.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

The cinder cone volcano with a less than complimentary name.

An homage to everyone's favorite prehistoric cartoon family.

One of the only known surviving coconut palm trees in the entire state.

Oldest building in California still in use.

Decommissioned experimental solar facilities that pioneered solar energy technology.

An ultra-modern vista that has been featured in so many films the house is a celebrity in its own right.

Stroll the grounds built by murder, suicide, and dirty oil money at one of Hollywood's most filmed mansions.

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

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Most famous work of one of Frank Lloyd Wright's sons.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

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

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

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

A "haunted" landmark on the coast of Southern California.

Remains of a Greek freighter trapped off of Rocky Point in 1961.

This museum honors the first Spanish land grant in California which is still in the hands of the original owner's family.

A small, peaceful sculpture garden with a grim memorial to a disaster that took place a few blocks away.

A surreal, Gaudi-inspired play space near an Anaheim community center.

Megachurch turned Catholic church comprised of 10,000 glass panes.