This downtown Dallas art installation is always on the lookout.

A medieval castle in the middle of rural Texas.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

Tracks near this Texas nature site were once thought to support the Creationist belief that man and dino coexisted.

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

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

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

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

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.

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

Turning night into day in Victorian-era Austin to thwart a serial killer.

Mysterious glowing orbs float through the desert night.

A Prada store in the West Texas desert that is never open for business.