Shoshoni Yoga Retreat is located in the mountains west of Boulder.
2.5 milies off of the Vail Pass Summit on I-70 is a well hidden group of backcountry cabins (Jay's, Walter's, Chuck's) known as the Shrine Mountain Inn.
According to its website, "A luxurious retreat conveniently located just minutes from downtown Colorado Springs, The BROADMOOR is the pinnacle of meeting locations in North America.
Historic Stanley Hotel located in Estes Park, Colorado and made famous by the movie "The Shining".