Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

The ruins of a town wiped out by the second-largest earthquake in recorded history.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

A living time capsule of the 1960s Richardson Bay water-front.

Subterranean house made out of a grain silo, located in the Santa Cruz Mountains.

In 1998, Larry Page and Sergey Brin briefly ran their fledgling company from this Silicon Valley garage.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

At this local mall, visitors are ushered through a 1940s jail exhibit.

Eight huge lanterns lining a city street can change color on command.

A sculpture dedicated to Napa Valley's oldest mineral water company.

800 apricot trees honor Silicon Valley's agricultural history.

California's longest-running tourist attraction is a stump.

At night, this glittering musical tunnel draws skaters and photographers.

A 90-acre park on former landfill that hosts an annual kite festival.

Giant jewel-toned statues fill the grounds of this Cambodian Buddhist temple in California.

The oldest U.S. Government building in California, and it's State Historic Landmark #1.

This small monument to the great inventor contains a time capsule and a Wi-Fi hotspot.

The Internet Age began with a transmission from this biker bar.

This large pile of traveler-curated rocks by the dry lakebed is a longstanding tradition on the Old Mojave Road.

This hidden amusement park is a magical escape for kids and kids-at-heart.

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

More than 700 species live within this murky marvel of a swamp on California's coast.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

A giant chess set, minus the psychedelic drug trip.