An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

A pair of pure white felines guard the entrance to a spot of California real estate established as an artist's haven.

A vast city of the dead, where the deceased outnumber the living by more than a million.

The most beautiful Taco Bell in the world even has surfboard parking.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

The world's first permanently occupied mountain-top observatory continues to report on the stars.

This infamous prison has a store where you can buy goods crafted by incarcerated people.

An amazing collection of fantastic reptiles, amphibians, spiders, and insects.

An "anarchical" no man's land, complete with garbage sculptures and a hobo-run "Landfillian Library."

A 90-acre park on former landfill that hosts an annual kite festival.

Bonsai garden in Oakland is curated by the first non-Japanese female bonsai master in the United States.

An enormous illuminated figure dances on the Las Vegas strip.

Masterful ceramic fountain and map of the Pacific Basin.

Deco Modern sculptures of the people of the Pacific, cast for the 1939 Golden Gate International Exposition.

A man-made island in scenic San Francisco Bay.

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

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 huge musical instrument played by the ocean.

This sailor's boneyard was lost under a parking lot for decades before being rediscovered.

Shoot for par over the bodies of the dead on this cemetery-cum-golf course.

A modest reminder of treacherous waters at the Golden Gate.

Sitting atop San Francisco's tallest hill, a cross honors the victims of the Armenian genocide.

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