Oldest building in California still in use.

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

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

60 feet of towering steel balances gracefully.

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

The unbelievably opulent home built for an infamous newspaperman.

A massive volcanic plug is now a protected area that hosts a number of bird species.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

A bigger-than-life pun that has become a beacon of altruism.

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

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

World-famous, Pink's still manages to keep its prized cult fetish status.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

Opened as part of the New Deal, the training facility now features World War II-era structures and a pylon that once stood at the World Trade Center.

A visionary, futuristic sculpture in Los Angeles that never met its extraterrestrial potential.

Thousands of turbines whir at at the origin of North American wind power.

Four hundred granite steps were built into this massive rock by the National Park Service.

Quite simply the largest tree in the world (by volume).

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

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

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

A man-made island in scenic San Francisco Bay.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A shining, cold, black organ lies in San Francisco's financial district.