Hit all 48 states:
complete trip around the U.S. in only 13,699 mile
http://www.randalolson.com/2015/03/08/computing-the-optimal-road-trip-across-the-u-s/
Or most of the National Parks:::
https://www.washingtonpost.com/news...ly-every-national-park-in-one-epic-road-trip/
https://www.mentalfloss.com/article/72030/map-shows-ultimate-us-road-trip
complete trip around the U.S. in only 13,699 mile
http://www.randalolson.com/2015/03/08/computing-the-optimal-road-trip-across-the-u-s/
Or most of the National Parks:::
https://www.washingtonpost.com/news...ly-every-national-park-in-one-epic-road-trip/
https://www.mentalfloss.com/article/72030/map-shows-ultimate-us-road-trip