A shady solar power system that couldn't hold up to the harsh desert conditions.

Kay Andrews's recipe was so good, her family immortalized it in stone.

In the heart of Brigham Young's promised land sits a festering plot of industrial ruin that has been claimed by society's outcasts.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Pyramid home to an obscure religious group that practices modern mummification.

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

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

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

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

California's most comprehensive horticultural library.

This turn of the century masterpiece has a mysterious goaty interloper.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

A hidden subterranean installation offers a view of the sky.

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

Its buzzing collection honors vibrator history.

A promotional sun clock on the site of San Francisco's great raceway.

Home to the "Circus" trees created by Axel Erlandson.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

This tiny lake temple dedicated to a water goddess seems to float on the surface.

A Roman-inspired temple once controlled half of San Francisco's waters.