The biggest drug trafficking passage between Mexico and the U.S.

Witness to many historic moments in early Texas history.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A mysterious drive-in nestled in the forest that leaves little to the imagination.

Park filled with machinery that drove the southern agriculture and oil industries forward.

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."

The world's tallest statue of an American hero.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

Official museum, hall of fame, and repository of the Texas Rangers.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.