This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

The last Americana on Route 66.

Abandoned bridge hidden deep in the San Gabriel Mountains.

Version of the French Riviera destroyed by the sea.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

The American rainmaker and a burst dam.

Oldest building in California still in use.

San Diego's most historic and haunted home.

A world-class observatory in the California desert.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

Where NASA's satellites and rovers phone home.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

One of the most unusual geological features, recognizable from a dozen hit movies.

Quite simply the largest tree in the world (by volume).

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Come for the speed, leave in love with the desert.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

A massive volcanic plug is now a protected area that hosts a number of bird species.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."