The Grand Canyon of Texas.

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

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

An homage to everyone's favorite prehistoric cartoon family.

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

See massive fossils that are over 200 million years old in northeastern Arizona.

Dramatic river bend surrounds a natural red-rocked pedestal.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

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

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

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

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

A 131-year-old wunderkammer of Texas history.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

Three hundred years of preserved Spanish colonial history in San Antonio.

A health museum containing a 27’’½-foot intestine.

The world's tallest statue of an American hero.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

A trio of colossal statues spread across a Dallas neighborhood chart the emergence of a giant robot born of a locomotive and spilled gin.

This downtown Dallas art installation is always on the lookout.