Towering basalt columns, a creation of fire and ice.

The ghostly remains of an accidental sea.

The only theatre in the world constructed specifically for sound movement.

This shop specializes in oddities and Victorian-inspired wonders.

America's most famous piece of self-built architecture.

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

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

A monument to the love people have for their pets.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

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

Golden Gate Park's historic collection of plants.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

One of the last free public hot springs is decorated with hippie art.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

A multimedia experience that chronicles the atrocities of racism.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

The unbelievably opulent home built for an infamous newspaperman.

With the touch of a button, you can read a randomly selected short story.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

A hidden subterranean installation offers a view of the sky.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.