An optical illusion found amid a logged redwood forest.

This Taoist temple is the oldest continuously used Chinese temple in California.

Rising out of miles of farmland, these buttes are sometimes called the world's smallest mountain range.

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

Home of what was the largest hydraulic mine in the world, producing gold and the first diamonds in the U.S.

A middle school sports field that many believe was the true location of the first successful powered flight - and not by the Wright Brothers.

Concrete strongholds stand guard over the Golden Gate.

Internationally-recognized arts center housed in a century-old former military barracks.

An enormous artwork that colorfully celebrates over 150 years of US military achievements.

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

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

Only hotel where you can legally launder money.

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

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

Perfect your fly fishing technique on their practice ponds.

These subterranean storage areas hold emergency water reserves.

This private residence was the template for one of the most beloved television homes of all time.

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

Olfactory delights in San Francisco's Botanical Gardens.

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

Over 315,000 preserved amphibians and reptiles in jars.

San Francisco’s condensed garden of incredible plant growth.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.