This is one really big nut.

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

Legends surround this jagged rock formation in the New Mexico desert.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

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

A museum dedicated to the alleged Roswell Incident.

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

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

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.

This rusted car found in Petrified Forest National Park's Route 66 exhibit may be the most photographed abandoned car in the country.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

The state's only comprehensive museum dedicated to the mineral that defined its history and economy.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A motel dedicated to Southwestern nostalgia.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

America's only nuclear missile silo open to the public.

See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Rippling sand dunes frozen in the Arizona rock.

This strangely amalgamated museum explores the history of the Timex clock company as well as archaeology.

This park is home to a massive bird sanctuary.

This statue commemorates the importance of hat manufacturing to Danbury, once known as the "Hat City of the World."