So I'm planning a long-ish trip in May to see some sights in the American Southwest I haven't seen before. I'm trying to work it out logistically to see as much as I can squeeze into 10 days, yet with enough time to actually enjoy myself at each stop. My biggest hurdle is the long boring rides from Mountain Home, Arkansas (where I live) until I see anything of interest in Colorado and New Mexico. So my question is: looking at my map/route below, what am I missing in Oklahoma and/or north Texas that will break up the monotony of those miles without taking me too far off my route? Any advice would be appreciated. Any suggestions for sites I've omitted would be welcomed. I am primarily interested in natural wonders. I have 10 days to make the trip. I've done a couple long trips before and I'm most comfortable covering 350-400 miles per day.