A little-known hot spring haven right below the highway.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

A replica that won't float away.

The longest living non-clonal organisms on Earth.

A dazzling display of red rocks weathered into spires and hoodoos.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Dig for your own trilobites in this goldmine of invertebrates.

This bird-shaped rock formation defies gravity, time, and classification.

One of the American Southwest's most extensive collections of Navajo rock art.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

Colorado's only true geyser is hidden within the San Juan National Forest.

See massive fossils that are over 200 million years old in northeastern Arizona.

A unique arch graces the Dolores River Canyon near the Hanging Flume.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

Along the old Route 66 is an abandoned trading post made from old telephone poles, built by a former circus clown.

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

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

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

Ancient pueblos built into the base of a natural canyon wall.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

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