Across Ring Mountain is a vast collection of Native American petroglyphs unique to the region.

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

At night, a grove of towering redwood trees growing through the pavement block out all light from the so-called “Dark Park” of Madrone Avenue.

George Lucas donated this park to honor the birthplace of his two biggest movie franchises.

Frank Lloyd Wright died a year before construction on his largest public project even began.

A lonely monument to the original Silicon Valley tech campus.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

An alley covered with 20 years of bubble gum.

Offering commanding views of the California coastline, this restaurant was a hub for the artists and bohemians of Big Sur.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

The unbelievably opulent home built for an infamous newspaperman.

This surreptitious shop is only open five hours per week.

A winding path built in secret on the edge of the continent.

The miraculous hydrant that saved the Mission District in 1906.

Gold Rush-era tombstones line the park's paths.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

An overlooked and unassuming engineering marvel.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.