One of the American Southwest's most extensive collections of Navajo rock art.

This spectacular track has run continuously since 1882.

The hallowed remains of a 900-year old Ancestral Pueblo great house.

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

No one knows exactly how deep the world’s deepest geothermal hot spring is.

A multi-storied adobe complex has been inhabited for more than a thousand years.

When ecosystems collide in the arid Southwest.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

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

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

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

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

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

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

This underfoot portrait is the work of a disgruntled painter inspired by a tragic poem.

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

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

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

Paleoamericans built these ancient walls high in the Colorado Rockies as part of an extensive hunting system.

This old train trestle and collapsed tunnel once allowed the railroad to negotiate the steep slopes of the Colorado Rockies.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

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.