These markers are used to document elevation changes around the famed dam.

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

Archaeologists believe this panel of petroglyphs depicting descending sheep and other figures in Glen Canyon are 3,000 to 6,000 years old.

A sharp bend in a dramatic river canyon cut through red rocks.

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

The damming of the Colorado River buried an iconic geologic formation before record-breaking drought brought it back.

This natural sandstone bridge hasn't been seen since the 1960s when Lake Powell covered it—until now.

This arch was featured prominently in the film.

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

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

A well-preserved Ancestral Puebloan ruin tucked beneath a desert cliff.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

These tall, red sandstone pinnacles outside Moab are often forgotten amid their more famous neighbors.

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

This now-protected stone circle is an archeological mystery and a stellar viewpoint.

It's safe—and permitted—to walk across these twin natural sandstone arches.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

This site is home to ancient petroglyphs and pictographs dating back to 6,000 B.C.

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

This high-desert oasis spotlights some of Colorado’s most sacred native plants.

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

A massive sea stack famous for its appearance in The Goonies.