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

A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Steep canyon walls hide a forested oasis in the West Texas desert.

A living museum dedicated to the legendary woodworker and his soulful furniture.

This California tree is the single source of the state's entire orange industry.

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

A giant desert bird that once swung music fans at Coachella now has a home in a nearby traffic circle.

Along a California highway is a kind of Jurassic Park made of metal.

Erroneously called the world's tallest flagpole, this landmark is devoted to "good neighborliness."

A hand-built folk art installation covered with messages of God's love.

The ghostly remains of an accidental sea.

This historic national park is covered in the stunning ruins of red rock pueblos.

An homage to everyone's favorite prehistoric cartoon family.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The only road through the heart of Glacier National Park.

Jail from the 19th century that was built by inmates.

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

Home to the deepest rift anywhere on Earth.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.