An environmental art installation inspired by farmhouses and crop circles.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

This nearly abandoned town was once a thriving mining community until a series of fires.

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 a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

The burial grounds of a secret society includes fences topped with fake Tesla balls.

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

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

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

This iconic science fiction house still looks like something from the future.

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

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

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

The largest source of fossilized insects anywhere.

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.

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

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

When ecosystems collide in the arid Southwest.

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

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

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

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

The most magnificent bottle house in a town strangely full of them.