A 19th-century cabin built into a hollowed-out Sequoia tree.

A masterpiece in Golden Gate Park by virtue of the artist’s debt.

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”

These subterranean storage areas hold emergency water reserves.

A huge musical instrument played by the ocean.

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

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

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

Half of a house.

San Francisco's oldest operating hotel, with a Victorian atmosphere and a "haunted" fourth floor.

This Japanese treats shop may have been the first business to mass-produce fortune cookies in the United States.

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

San Francisco’s condensed garden of incredible plant growth.

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

Temporary Burning Man sculpture made of two 18-wheelers.

“Live hard, ride fast, eat pizza” at this joint filled with Evel Knievel memorabilia.

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

A giant open-air sculpture made of over 200 full-sized boats.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Back in 1952, you could get a mushroom cloud chaser with your atomic cocktail.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

A life-sized mammoth sculpture marks the spot where the remains of a Columbian mammoth were discovered in 2005.

An homage to everyone's favorite prehistoric cartoon family.