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

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

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

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

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

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

Abandoned silver mine strewn with wrecked and twisted structures.

When ecosystems collide in the arid Southwest.

This spectacular track has run continuously since 1882.

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

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

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

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."

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

A memorial dedicated to veterans of all wars especially those lost in Bataan defending the Philippines during World War II.

An ode to the history of telephones inside a telephone building.

Volunteers spent years restoring a vintage steam locomotive to operating condition.

High in the Sacramento Mountains, a facility dedicated to studying the sun.

The remains of Abó, Gran Quivera, and Qurai are monuments to the long, complicated history of the Indigenous people of the Southwest.

A rare memento of a lost Indigenous group.

Explore a misty river canyon from a metal bridge system.

A beautiful red-faced slot canyon in northern New Mexico.

This sundial indicates the time based on where you stand within it.