My family and I are taking a road trip from Houston, TX to the Grand Canyon and then to Denver, CO. I am trying to find the most scenic route and ideas for places that are "must see". I'm not even sure where to start here. There are no kids coming so we are open for pretty much anything. I also need to some advise on the locations, things to do, best spots for pictures, trails, basically anything of interest. i know that there are lots of websites showing everything that you can do in each place, but i want to know from other peoples experiences what the best options are.