This unique landscape is the only place in the world to dig for hourglass-selenite crystals.

This mesmerizing and surreal landscape features intricate patterns of white and red sandstone.

This towering volcanic plug stands out among the dramatic formations that dot this otherworldly desert valley.

Explore a wealth of fossils in one of the most prolific dig sites in North America.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

The world's largest squirrel statue clutches a pecan bigger than your head.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

The highest point in Washington state is a volcano covered in glaciers.

The highest point in Texas is capped by a big silver pyramid.

Search for traces of the dinosaurs that roamed here more than 90 million years ago.

The wreckage of a crash that killed nine people still litters the Franklin Mountains.

Local artists have long claimed these highway pylons as a place to celebrate Mexican-American history through artwork.

This site honors the end of a 100-year boundary dispute between the United States and Mexico—all started by a river's shifting course.

A prison-like structure guards the remains of a notorious Old West outlaw.

The house's confection-like decorations are the result of one man's painstaking work over decades.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

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

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

A cave's rare beauty held a cavernous secret hidden underground.

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

This cave column thousands of feet below the earth’s surface is rightly named for one of the most colorful park rangers in history.

Ancient volcanic activity made this into an exciting rockhounding site.

A very tiny church, bisected by a now-dead oak tree and marooned in the middle of a shopping center parking lot.