A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

Beauty and history abound in this remote West Texas canyon.

A small "palace" and museum made of, and devoted entirely, to salt.

This memorial marks the devastating day that Texas City was destroyed in a daisy chain of exploding ships.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

Human remains in varying states of decay are strewn about this Texas State facility for scientific study.

On a dusty county road sit the ruins of a ghost town's abandoned church.

The final resting place of an outlaw, whose legend grew after death.

A wacky, UFO-shaped house in a suburban neighborhood.

Decaying military base deactivated in the 70s is now visited by urban explorers and military enthusiasts.

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

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

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

A taste of Middle Earth, in the middle of the Bayou City.

A gorgeous garden oasis with winding paths, stone bridges, and a troubling history.

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

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

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

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

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

A modernist landscape of water and sci-fi concrete.

This Florida arena, once host to "the fastest game in the world," has sat empty for 25 years.

An eclectic treasure trove of maritime marvels.