Eons ago, a rushing lava river formed this pristine passage through solid rock.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

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

A coal fire has been burning underground here since 1896.

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

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

The site where a nuclear bomb was lowered over 8,000 feet underground and detonated as an experiment in natural gas extraction.

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

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

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

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

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

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

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

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

A sculpture for the sun and stars, created by Nancy Holt.

A quirky old tree covered in tokens, cans, and bottles of wishes.

A Mars simulation in the southern Utah desert.

This outsider art paradise is filled with dinosaur sculptures crafted from recycled machinery.

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

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

A cemetery full of touching tombstones from a community of railroad workers, uranium miners, and Cold War missile launchers.

This gallery of prehistoric red ochre art lines the wall of a scenic segment in Utah's San Rafael Swell.

Kay Andrews's recipe was so good, her family immortalized it in stone.