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

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

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

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

The remains of an early 1900s dude ranch that operated until the 1970s.

The largest source of fossilized insects anywhere.

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

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

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

Paleoamericans built these ancient walls high in the Colorado Rockies as part of an extensive hunting system.

The world's largest sticker ball weighs in at a mighty 231 pounds.

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.

This hot dog-shaped diner has moved all around Colorado, never been to New York.

Antique automobiles, phonographs, organs, and farm equipment.

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

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

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

Central City celebrates its most famous madam by racing beds down Main Street.

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

A research lab and hands-on museum where visitors can experiment with retro technology.

The final resting spot of the Colorado Transportation Department's beloved unofficial mascot.