Visit a remnant California's Gold Rush, which locals claim is haunted by spirits from the past.

The world’s oldest active sailing ship.

See four top-secret US spy aircraft of the Cold War era, including the legendary SR-71 Blackbird and the A-12 Oxcart.

Allegedly haunted by Walt Disney himself, this inconspicuous lamp is always kept lit in his honor.

This massive redwood tree has a drive-thru tunnel carved out of its trunk.

An informal walk of fame in front of a Hollywood office building remembers a comedic great and his associates.

This small shack near the entrance to Sequoia National Park has been in almost continuous operation for the last century.

Art Deco stylings conceal the true nature of this bridge.

Enormous crabs, bioluminescent jellies, and other amazing creatures from the ocean’s depths—some of which are in an aquarium for the first time ever.

The tallest bridge in California was constructed for a project that was eventually cancelled.

A century and a half of research in the sciences and natural history, still going strong.

After serving in World War II and picking up Apollo astronauts, this aircraft carrier has been turned into a museum overlooking the San Francisco Bay.

The first U.S. town to secede from the Union, only to vote themselves right back in.

One of Hollywood’s favorite government buildings.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

A second generation sun-powered marvel lights up the night.

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

This contorting sculpture is the tallest in San Francisco.

A plaque and memorabilia collection mark where A&W got its start.

A working miniature city designed to teach kids about safety and presumably city planning.

This historic California cemetery holds the bodies of veterans of both the Civil War and the Donner Party.

At this 1940s-era neighborhood favorite, you can still drink a cherry phosphate.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.