It takes a nine-mile hike to reach these hot springs, but weary hikers are rewarded with stunning views and a warm soak.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

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

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

Surrounded by a hundred mile radius of billboards, Little America is a roadside attraction whose primary appeal is hospitality.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

An abandoned colonial French prison notorious for its hellish conditions.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

At least seven hues of blue and turquoise make this freshwater lagoon unique.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The longest living non-clonal organisms on Earth.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

"Only the devil could play golf here."

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Mine your own precious stones.

At the base of Steens Mountain resides an otherworldly desert.

This extinct shield volcano is the lightning rod of the Cascades.

A volcanic fissure over two miles long and up to 70 feet deep.