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.