Estes Park is a beautiful mountain town with a cute downtown area you can walk around in. Check out their website for more information.
Rocky Mountain National Park is not only the backdrop to our wedding but also a wonderful place to explore on your own. Check out the hiking trails if you have time! (and be sure to check the weather before traveling to a trail)
The Stanley Hotel offers a few great tours, including a historic tour of the hotel, and one specifically about The Shining. Regardless, it's a beautiful hotel and worth checking out even if you don't go on a tour.