This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

The unbelievably opulent home built for an infamous newspaperman.

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

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

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

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

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

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.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Its buzzing collection honors vibrator history.

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

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

A huge musical instrument played by the ocean.

One of the oldest adobe structures in Northern California.

Today's aerospace industry can be traced back to one man and his gliders.

The headquarters of the semiconductor giant has a 10,000-square-foot museum.

One of the largest Marian shrines on the West Coast stands rather unexpectedly in Silicon Valley.

The tallest bridge in California was constructed for a project that was eventually cancelled.

A dentist's hated concrete colossi are now beloved icons of the community.

A fine mixture of the old and the new topped with an art deco neon spire.

Established in 1853, this crumbling cemetery sits forgotten on the corner of Church and Chapel in Gold Country.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."