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

A classically inspired temple in Redwood City.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

This controversial depiction of the "Founder of California" looks as though it was sculpted from mashed potatoes.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

A promotional sun clock on the site of San Francisco's great raceway.

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

Golden Gate Park's historic collection of plants.

The remains of a 12th-century chapter house in Golden Gate Park.

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.

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

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

The remains of a ruined mansion memorialize the 1906 earthquake.

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

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

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

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

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

America's oldest Italian restaurant is a San Francisco institution.