Home to the deepest rift anywhere on Earth.

An entire town preserved as a historic landmark.

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

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An architect's childhood fantasy treehouse made real.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

This town is home to the world’s largest arch constructed entirely of elk antlers.

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

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

In the 1950s, two women saved this grand theater in the Colorado mountains from demolition.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

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

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

Take a self-guided tour through one of Colorado's most elevated mining districts.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

A riverside tiny house with books and other treasures galore.

This spectacular track has run continuously since 1882.

The location where the iconic movie character declared it was time to go home.

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

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

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.