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

Nature has shaped this drainage tunnel into the digestive tract of a mighty beast.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

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

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

Dramatic river bend surrounds a natural red-rocked pedestal.

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

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

This balancing rock is one of Utah's most unusual geological formations.

This magnificent natural sandstone bridge is one of the largest in the world and is an iconic symbol for Lake Powell.

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

A house carved into a rock in the 1940s.

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

Despite its name, this route in southern Utah offers a heavenly day trip.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.

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

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

This town is home to the world’s largest arch constructed entirely of elk antlers.

A former sanitarium where soldiers were sent to recover in the healing waters of hot springs.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

A dazzling display of red rocks weathered into spires and hoodoos.