The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The location where the iconic movie character declared it was time to go home.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

The fifth-longest natural arch in the world, and the longest outside China.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

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

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.

A tunnel with windows, so you don't miss out on the impressive views.

A house carved into a rock in the 1940s.

This roadside stop between Goblin Valley is the perfect location to view some of the region's natural wonders.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

This historic national park is covered in the stunning ruins of red rock pueblos.

Ancient pueblos built into the base of a natural canyon wall.

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

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

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

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

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

A museum dedicated to the alleged Roswell Incident.

Hidden in the New Mexico desert southeast of Roswell, nine small deep lakes formed inside sinkholes.

Steep canyon walls hide a forested oasis in the West Texas desert.

A Prada store in the West Texas desert that is never open for business.