Today's aerospace industry can be traced back to one man and his gliders.

The oldest house in the capital of Silicon Valley.

Hidden inside a gift shop that doubles as a museum, this gargantuan yo-yo can only be operated by crane.

Anyone can control this glittery light installation with just a phone call.

Although he donated over 3,000 acres to Los Angles, Griffith's life was marred by controversy.

A lonely monument to the original Silicon Valley tech campus.

The oldest attraction in Disneyland is a prehistoric stump that Walt may have bought for his wife.

Three plaques mark the spot where the "forgotten father of broadcasting" worked.

The longest continuously operating Elk's Lodge in the country.

A sparse, solitary sequoia still stands as a living tribute to the famous conservationist who planted it—but it's dying.

Inside this library turned museum, the history of Modesto and Stanislaus County is on full display.

A replica of the first public theater built in California.

This cabin from the 1850s is one of the first structures built by Chinese immigrants in California.

Standing in for the first ship to navigate the Northwest Passage.

Sitting atop San Francisco's tallest hill, a cross honors the victims of the Armenian genocide.

This painted marvel is San Francisco's 400-foot ode to urban biking.

The short oil boom of Venice Beach, and its swift removal from the tourism-laden landscape.

This secluded date farm can be reached only by following a bumpy, single-lane desert road.

Once the site of speeding horses, now home to picnickers and public concerts.

This conservation area is also home to many of the region's desert tortoises.

This 19th-century museum inside of a lighthouse is only accessible during low tide.

A simple plaque remembers a California island massacre that claimed more than 100 lives.

Fake rail crossings mark the site of an influential doctor's demise.

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