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

A 131-year-old wunderkammer of Texas history.

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

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

Ruins of a once-opulent grand Victorian resort.

This former Texas landfill is flush with 300 million-year-old fossils, all fit for the taking.

A view-altering observatory at the University of Texas.

A private collection of massive steel monsters guarding a Texas pipe works.

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

This eclectic, mosaic-clad home includes a bamboo ping-pong loft and a "Whispermaphones" intercom.

This downtown Dallas art installation is always on the lookout.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.

This sacred cavern, 400 feet deep, is home to millions of bats and an ancient burial ground.

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

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

A medieval castle in the middle of rural Texas.

Free public park and gardens filled with peacocks and peahens.

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

A popular swimming hole that hides one of America's most deadly diving spots.

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.

A modernist landscape of water and sci-fi concrete.

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

This mid-19th-century dugout was once home to a Swedish family as they erected their homestead.