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.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Established in 1925, Kiddie Park claims to be the oldest amusement park in the U.S. - a cozy little time warp nestled in a shady corner of the modern world.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Colorful curls of hand-blown glass form a captivating tower in San Antonio's Central Library.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

An abandoned, decaying sculpture garden built by an eccentric physician in the 1920s now looks more like a forgotten cemetery.

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

A 131-year-old wunderkammer of Texas history.

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

These boots are made for selfies.

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

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.

The oldest continuously occupied public building in the United States.

This opulent Pueblo Deco movie palace melds Art Deco and Native American motifs.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

Home to New Mexico's longest bar, this watering hole also has a mining museum and a haunted history.

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.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

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

This is one really big nut.