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

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

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

Dramatic river bend surrounds a natural red-rocked pedestal.

The longest living non-clonal organisms on Earth.

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

Dig for your own trilobites in this goldmine of invertebrates.

A replica that won't float away.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The magic's in the hole!

A heavenly experience, right here on Terra Firma.

The largest island on the great salt lake is home to curious creatures and strange stories.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.