Will be taking a bus trip from McAllen, TX to Monterrey Sept. 3-5. We have two nights at the Doubletree and am interested in things in that area since we will have time in the late early p.m. for two days to explore. Interested in suggestions for restaurants, shops, funky art places, etc. Actually -- would be interested in all suggested sites since we may blow off the second day's tours entirely and go it on our own. Thoughts?