Out of all the places i've been in 'Merica, my favorites as far as sightseeing goes were the National Parks, Yellowstone and Yosemite primarily. If you get a chance to, be sure to check out Niagara falls near in NY, and also the great lakes (specifically Lake Superior, or Lake Michigan) When we went to lake michigan we charted fishing boats and caught some huge salmon. Lots of friendly people in that area. I've also been to some of the larger cities (NYC, Reno, etc.) and I didn't like them nearly as much as I enjoyed the scenery in Yellowstone and Yosemite.