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

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

Baptisms in troughs and post-sermon rodeos at the world's biggest cowboy church.

The Grand Canyon of Texas.

A house carved into a rock in the 1940s.