I am planning on a 3 month road trip with some friends. My friends and myself would like to see the main tourist attractions and National Parks, we would also like to see some of the less known places in order to get a feeling for American culture and lifestyle. I've decided I want to start in Seattle and finish in Miami, FL - I've been able to plan what I want to do for both the West and East Coast, but which I know nothing about. Any suggestions as to what I can do here - or in fact throughout my entire road trip would be really valued...there's this huge chunk in the middle