Easily the best zoo we have ever been to. Keep in mind, it is on the side of a mountain, so wear your walking shoes. And bring some cash to feed the giraffes!
There is so much hiking around! Check out Garden of the Gods, the Manitou Incline, Seven Falls (has a fee), Cave of the Winds, or any of the other gorgeous, mountainous hikes. Out of towners, keep the elevation in mind. Bring a LOT of water (more than you think).
At the Broadmoor you can find hiking, horseback riding, falconry, luxurious hotel stays, and more. Activities can be reserved without booking a hotel room.
Try a beignet at Rocky Mountain Beignets, play games at the "World Famous" penny arcade, or simply walk and look out for colorful decorations.