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

This rustic old building is said to be the most photographed barn in America.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Home to the deepest rift anywhere on Earth.

This impressive tunnel was dug entirely by hand over the course of 36 years.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

California's own majestic geyser is powered by a subterranean volcano.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

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

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

This playground sculpture of an icon from the past is dedicated to the children of the future.

The only road through the heart of Glacier National Park.

These giant metal horses graze on a hilltop near the Montana highway.

A house built from trash known as the poor man's Hearst Castle.

A chain of bells connect the California Missions and honor the legend of the "King’s Highway."

This giant slab of driftwood marks the beginning of the Winnemucca to the Sea Highway.

The arch that celebrated the completion of the Lincoln and Victory highways.

This beloved roadside attraction welcomes visitors with his signature neon smile.

These once-beautiful historic graveyards are set against the barren Virginia City hills.

A giant open-air sculpture made of over 200 full-sized boats.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

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

A massive volcanic plug is now a protected area that hosts a number of bird species.