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

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

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

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

A late-19th century diversion canal built by hand crosses Bryce Canyon National Park and is still in use.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

An improbable waterfall springs from an orange-white cliff face, tumbling into the headwaters of the Virgin River above Zion National Park.

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

Not your typical pet cemetery.

Rippling sand dunes frozen in the Arizona rock.

This mesmerizing and surreal landscape features intricate patterns of white and red sandstone.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

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

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This spectacular track has run continuously since 1882.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

The hallowed remains of a 900-year old Ancestral Pueblo great house.

A clear blue swimming hole with hidden caves, still unexplored.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.