Most famous work of one of Frank Lloyd Wright's sons.

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

This grand mansion has starred in everything from Bones to Buffy.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

A ghost town at the airport is now a refuge for blue butterflies.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Historic funicular railway, believed to be the shortest railroad in the world.

Sister store to the Echo Park Time Travel Store.

An inconspicuous footbridge beloved by San Diego locals.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

An essential stop before plundering, BYO Cutlass.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A common entry point to the Griffith Observatory trail holds its own wonders.

Quite simply the largest tree in the world (by volume).

The ghostly remains of an accidental sea.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

San Francisco's newly reopened hands-on science museum.