A spring-fed pool so deep it's used for scuba diving as well as swimming.

A health museum containing a 27’’½-foot intestine.

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

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

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

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...

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

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

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

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

A grove of colossal man-made flowers built to collect the sun's rays.

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

A Texas-sized particle collider that was abandoned due to its Texas-sized budget.

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

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

A modernist landscape of water and sci-fi concrete.

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

"The Reptile Man's" very own roadside zoo features an albino alligator.

This Cold War missile launch site has been abandoned for 40 years.

This remarkable collection devoted to the study of fish includes 1 million preserved specimens from all around the world.

Nuclear reactor created the plutonium used on Nagasaki.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

Legend says that these tall basalt pillars are the petrified wives of a trickster god.