Where hills of dirt conceal the burial ground of one of the most powerful ancient Native American societies.

The final resting place of the most famous outlaw in the Old West.

A museum dedicated to the alleged Roswell Incident.

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

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

The water in this preserved area spawns vegetation that gives it a deep green color.

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

The tree is thought to be the oldest oak in Texas and was once crowned state champion for its monumental size.

The Grand Canyon of Texas.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.