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

This spectacular track has run continuously since 1882.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

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

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

When ecosystems collide in the arid Southwest.

The highest bridge in America was built for an almost unnervingly small amount of money.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

The largest self-built castle in the U.S., six decades in the making.

This naturally-sourced hot spring is now home to a clothing-optional resort.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

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

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A quirky old tree covered in tokens, cans, and bottles of wishes.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

Water flowed out of the town's unusual tree stump fountain in the 1930s, and the well still runs today.