San Francisco’s century-old Christmas Tree.

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

A whimsical antique shop with a strong air of mystery, filled with items from ages, and what feels like worlds, past.

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

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.

The oldest alley in San Francisco is paved with a reminder of the city's original shoreline.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

A quiet nook at the top of a little-known hilltop park named after California's first poet laureate.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

One of few lasting examples of the brief octagon craze that developed into folly.

These six walrus head statues harken back to a time when this area wasn't far from the oceanfront.

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.

The original place where water met land in the City by the Bay is outlined in brass.

A brooding mansion of clinker brick stands out among the Victorian houses of Pacific Heights.

Faceless white figures loom over the city from the rooftop.

A shining, cold, black organ lies in San Francisco's financial district.

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

A pair of mutilated bronze octopuses slump at the base of the monument honoring California's admission to the U.S.

Tiki luxury on Nob Hill.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

27-room home built with the fortune of a sugar magnate.

Gold Rush-era tombstones line the park's paths.