One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

There are eight natural springs around town, each with a slightly different taste.

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

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

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

This super steep hike ascends 2,000 feet in less than a mile.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

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

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

When ecosystems collide in the arid Southwest.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

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.

The first permanent memorial to a unique secret weapon of World War II.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

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

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

This museum offers an actual time machine back through Colorado's past.

A collection of over 15,000 zines works to preserve DIY publishing culture.

A small horde of mythical creatures lurk almost imperceptibly within the museum's wildlife dioramas.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.