Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

This Colorado fire station has been in continuous operation for more than a century.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

This enigmatic building features numerous architectural styles.

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

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

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

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

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

The narrow mountain road that carves a path between Florence and Victor is tied to ghost towns and ghost stories.

The site of the "Bone Wars" between two rival paleontologists during the dinosaur rush of the 19th century.

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

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

This 19th century jail was mainly used to incarcerate the drunk and disorderly.

The largest self-built castle in the U.S., six decades in the making.

An abandoned sawmill from more than 134 years ago stands testament to the ambition of one man.

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

A mental health hospital dating back more than 139 years, now features a museum.

This memorial pays homage to Pueblo's four Medal of Honor recipients.