This painted marvel is San Francisco's 400-foot ode to urban biking.

Golden Gate Park's historic collection of plants.

Olfactory delights in San Francisco's Botanical Gardens.

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

These subterranean storage areas hold emergency water reserves.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

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

A hidden subterranean installation offers a view of the sky.

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

Art in the form of a winding, man made crack in stone.

Once the fastest ship from San Francisco to Tahiti, the Galilee now lays in pieces in three different cities.

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

The oldest lawn bowling club in the United States.

The legendary statue-hating superintendent of Golden Gate Park is honored with... a statue.

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

An overlooked and unassuming engineering marvel.

Half of a house.

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

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

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

The rustic cabin-like decor of this Arts and Crafts-style church reflects the love of nature central to its little-known theology.

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

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

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.