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

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

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

A popular swimming hole that hides one of America's most deadly diving spots.

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

A museum devoted entirely to the rattlesnakes and snake-related art.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

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

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

A clear blue swimming hole with hidden caves, still unexplored.

A museum dedicated to the alleged Roswell Incident.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Most-visited and most-photographed slot canyon in the American Southwest.

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

Rippling sand dunes frozen in the Arizona rock.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

This former asylum for Black Americans is haunted by its history of violence and racism.