The Mountain Air Ranch is located in the city of Littleton, and has been open to the public for over 70 years. You can buy a membership to be able to use their amenities, and they will also allow you to try it once for first timers.
If you've ever taken a drive through Aurora, you may have come across this building at the intersection of Colfax and Peoria that has made you curious. Well now your questions are answered, and your mind has gotten wilder!