Historic, 19th-century wagon wheel ruts cut into soft volcanic ash.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

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

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

This remote Colorado canyon is home to the second-largest collection of natural arches in the world.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

It would be easy to walk past this unusual piece of art and have no idea it pays tribute to the odd life of a real chicken.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

A hotel with a rich Wild West history of miners and bootleggers.

The site where a nuclear bomb was lowered over 8,000 feet underground and detonated as an experiment in natural gas extraction.

Two creeks flow out of either end of this canyon in opposite directions.

A fake mine that was made using real mining techniques which is also used as a community center.

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

A river runs through this remote valley in a very unexpected way.

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

A recreation of an Old West apothecary full of curios.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

This interpretive path lets you get up close and personal with dinosaur bones.

Even in death, he's still your huckleberry.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

The fifth-longest natural arch in the world, and the longest outside China.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

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.