The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

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

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Its buzzing collection honors vibrator history.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A hand-built folk art installation covered with messages of God's love.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

Shop selling 500 flavors of soda has something for everyone.

The ghostly remains of an accidental sea.

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

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

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

This historic graveyard was partially paved over to create a streetcar line.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

The tiniest tiki room in San Diego.

An ode to the friendship between four Pacific Rim countries.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

Swarms of butterflies cannot compare to the awe inspired by the publicly-funded nakedness once displayed in this sunken garden.