Minimalist modern art on a repurposed military base in rural Texas.

Museum mostly in name, and only a restaurant depending on the day, this place could only exist in Marfa.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

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

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

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

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

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

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

Mysterious glowing orbs float through the desert night.

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

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A 131-year-old wunderkammer of Texas history.

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

This museum showcases the history and contributions of the U.S. Army to the medical industry, both on the battlefield and off.

Ruins of a once-opulent grand Victorian resort.

The summer home of the largest colony of bats in the world.

A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

This is one really big nut.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.