In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

A downtown park built on top of unclaimed graves.

The childhood home of Henry Jones Jr. is now an adventure-themed bed and breakfast.

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Abandoned silver mine strewn with wrecked and twisted structures.

Colorado's only true geyser is hidden within the San Juan National Forest.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

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

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

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

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

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.

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."