I'm from Portugal and already done my share of traveling around Europe via train, and me and some buddies are planning a road trip from coast to coast, starting in late Jully, and ending in late august to visit the great USA.
We plan to leave Lisbon and arrive at NY in jully 24 at 8 pm, after that, we plan to hit Washington DC, the grand canyon, las vegas and end it in s. francisco were we get the plane back in the 20th of august. Those are some of the mandatory places we want to pass trough, but on the way from washington to the grand canyon we simple don't know were to go. I would like to see the Yellowstone national park, take some routes in famous deserted landscapes, and see as well some of the magnificent forests and waterfalls (niagara).
Do you experienced american travelers think 3 weeks and a half is enough for sightseeing? And if so, what are the best routes taking in consideration what i want to see? Should we go by north? South? I acknowledge my ignorance and would require some help, if possible, to get the most out of this trip.
Thank you, and looking forward for it. ;)