Where NASA's satellites and rovers phone home.

The Citrus Variety Collection at UC Riverside contains two trees of each of the 1,000+ varieties of citrus.

A Cold War site complete with rusty structures, hiking trails, and beautiful views.

Home to secret Eastern Bloc spy equipment and the largest stretch of the original Berlin Wall outside of Germany.

Salt is slowly eating away this abandoned saltworks town in the desert.

Burping, gurgling geothermal mud pots by the Salton Sea.

An Old West film set seen in countless TV shows and movies is open for the public to explore.

This enormous World War II relic is one of the largest wooden structures in the world.

This quaint archive of the silent era preserves and pays homage to a seminal moment in film history.

This large collection of tiny things revels in the art of fine machinery well made.

Inside this clubhouse is a cinephile's paradise.

Machinery left over from California's once thriving mercury industry now attracts artists and explorers.

Colorful Native American paintings are hidden within this small cavern.

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

The California capital city once stood 10 feet lower than it does today.

Crumbling pink walls and murder memorials preserve the pioneer history of Joshua Tree.

Its dark depths conceal millions of rare, delicate crystal formations.

Radioactivity still cause for concern at this urban explorer's paradise.

A free, public museum dedicated to the fascinating science of sight.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

Space program, pneumatics and more, bits and pieces, for movie sets or the common man.

This desert oddity hides in plain sight thanks to a cartographic error and a desert explorer with a punny sense of humor.

This abandoned boat was left in place thanks to its rotting beauty.

This stockpile of junked electronic and mechanical gadgets is a favorite among Hollywood prop masters.