This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

Erosion and time have created a naturally-formed water park.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Despite being a perfectly pleasant place to be, Loyalton can't seem to attract any visitors.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Nuclear waste dump site now an environmental sanctuary.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

A 300-ship graveyard, with a few still visible at low tide.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

Home to the "Circus" trees created by Axel Erlandson.

A storybook European village in Berkeley.

A huge musical instrument played by the ocean.

A hidden subterranean installation offers a view of the sky.

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

An essential stop before plundering, BYO Cutlass.

A 140-year-old castle with underground caves hidden in San Francisco.

A large instrument played by the wind.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

A classically inspired temple in Redwood City.