The so-called "Bridge of Thighs" in Palm Springs allows nudists to discreetly cross the road.

A huge work of Burning Man-inspired outsider art on the grounds of a California winery.

This simple highway curve has become a comedic pilgrimage site.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

A modest reminder of treacherous waters at the Golden Gate.

The first fresco Diego Rivera painted in the United States can be found in the former San Francisco Stock Exchange.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

One doctor's retirement plan included opening this award-winning Mexican-Indian eatery on the ground floor of a hospital.

Hidden beneath a lake for decades, this brutalist mine has now emerged from beneath the receding waters.

An abandoned boat that's been stranded mysteriously for decades.

A monument to a one-legged kidnapper, horse thief, and charlatan asks visitors to throw rocks in a pile.

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

Where NASA's satellites and rovers phone home.

A remote desert lookout offers unparalleled views of the California badlands for those who brave the trek.

A celebration of once forgotten materials.

'Cause the fence start shaking, the earth was quaking.

These lush groves of fan palms rise up like oases out of southern California's Colorado Desert.

A huge collection of rocks, gems, and crystals.

This giant temperature attraction created some giant electric bills.

Cows on a ranch are commonplace, scattered cow bones everywhere? Not so much.

Eat a tasty meal in the house where John Steinbeck was born.

A 19th-century cabin built into a hollowed-out Sequoia tree.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

Thirteen trees representing the original thirteen colonies were planted with soil from historic Revolutionary battlefields.