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

This quiet park's strange sedimentary spires were named after Kodak's color film.

Rippling sand dunes frozen in the Arizona rock.

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

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

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

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

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

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

Although it also features red, orange, and variegated cliffs of Navajo Sandstone, this state park is often overshadowed by its more famous neighbor.