Collapsing castle on the Hudson river was once the storage site of military surplus business.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Furniture tries to escape an abandoned building in San Francisco.

This small shack near the entrance to Sequoia National Park has been in almost continuous operation for the last century.

California's longest-running tourist attraction is a stump.

The flow from this waterfall sometimes comes out of springs below its rim.

At night, a grove of towering redwood trees growing through the pavement block out all light from the so-called “Dark Park” of Madrone Avenue.

This park is home to well over 100 handmade birdhouses.

This rock formation named for its unique shape is one of many that call the Alabama Hills home.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

Whiskey lovers, this is your happy place.

A watering hole where the options for seating include a bar, patio, or subterranean cave.

This little museum has an exhibit devoted to the elusive forest denizens.

The most isolated mailbox in America lets desert travelers record their passing.

Colorful Native American paintings are hidden within this small cavern.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

A grove of "candelabra redwoods" deep in California's Lost Coast.

California's own majestic geyser is powered by a subterranean volcano.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

The fossilized remains of ancient California redwoods.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

This residential door allows San Francisco muggles a glimpse at the wizarding world.