This Colorado hiking trail provides a small gold mine of abandoned gold mines.

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

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

This spectacular track has run continuously since 1882.

When ecosystems collide in the arid Southwest.

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

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

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

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

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

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

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

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

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."

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

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

A lifetime's accumulation of bric-a-brac and kitsch.

This once rural mansion now sits in the heart of the city.

A rancher expanding a natural spring for his cattle came up with bones – lots and lots of them.

Underneath downtown Lincoln resides a network of caves that was also the city's first brewery.

These experimental weapons brought World War II to Nebraska as well as 26 other U.S. states.

Site of the 1879 Cheyenne Outbreak and the site where famed Sioux chief Crazy Horse met his fate.