My girlfriend and I are planning a 16 day trip cross country in july. Our thought is to travel west to colorado (in 2 days if possible), loop through colorado, utah, arizona and new mexico, and then return. We would like to take scenic roads (looking for advise) and stop at several national parks (looking for advise) and interesting landmarks (we are open to any cool spots). If anyone has any recommendations for great visuals and/or local color please respond. Any help is appreciated. Thanks.