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

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

Home of the International Space Hall of Fame.

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

This is one really big nut.

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

This quirky hot springs town known to locals as "T or C" was named after a radio show.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

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.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

The ghost town that ended up on Ebay.

Rippling sand dunes frozen in the Arizona rock.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

What is the Thing?

Limestone caves with spectacular showcase chambers.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.