Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

An emerald-green grotto just a short trip from Austin.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

The top of a giant mesa, just outside of Amarillo, appears to float in the sky above.

An off-the-beaten path cave with an underground lake.

A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

Some 10,000 works of ancient rock art cover these volcanic basalt outcrops near the Gila River.

A museum devoted entirely to the rattlesnakes and snake-related art.

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

The state's only comprehensive museum dedicated to the mineral that defined its history and economy.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

A natural history wunderkammer in the middle of the desert.

What is the Thing?

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

One of the largest, oldest, darkest, quietest motel rooms in the world.

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

Legends surround this jagged rock formation in the New Mexico desert.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.