This diner's a kitschy dreamland for anyone whose heart is stuck in the 1980s.

The last of a gourmet supermarket chain, this store helped spark California's Food Revolution.

I Street Bridge is the heaviest swinging center bridge in the United States.

This 19th century train workshop is a treasure trove of railroad history.

The California capital city once stood 10 feet lower than it does today.

Art Deco stylings conceal the true nature of this bridge.

At this 1940s-era neighborhood favorite, you can still drink a cherry phosphate.

The largest drain hole in the world.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

This eatery transports diners to a place that no longer exists: East Germany.

Golden Gate Park's historic collection of plants.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

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

The restored and active Victorian-era final resting place of San Francisco.

Chevron maintains one “Standard” brand station per state so it doesn’t lose the trademark.

A modern mechanical planetary system, part of a 10,000 year clock.

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

Its buzzing collection honors vibrator history.

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

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

One of the last remnants of the city's Chinese nightclub scene is now a dive bar selling killer mai tais.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

A rococo retro-futurist future-rustic vernacular between yesterday’s tomorrow and the future that never was.

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