A view-altering observatory at the University of Texas.

At the "Garage Mahal" in Houston, car culture is about more than just driving.

A medieval castle in the middle of rural Texas.

This downtown Dallas art installation is always on the lookout.

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.

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

Free public park and gardens filled with peacocks and peahens.

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.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

Alongside this Memphis trail are several sculptures that show trail-goers how to relax.

Ethereal alien hums and haunting whale songs emitting from...a giant sheet of vibrating metal?

This museum dedicated to an oft-overlooked support industry features a surprisingly moving brass diorama of a man being saved from a sinking car.

This limestone outcropping was once a ceremonial site for ancient Native Americans.

This mansion turned restaurant was once a pitstop for Al Capone during his travels.

This popular park is home to a sea serpent sculpture that now overshadows the twisted history of its creation.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.