For all you future roadtrippers (1 Viewer)

[NutterButter]

http://www.randalolson.com/2015/03/08/computing-the-optimal-road-trip-across-the-u-s/

 

[FreeBaGeL]

It seems like the assumptions ruin the premise right off-hand. Particularly...

The trip must make at least one stop in all 48 states in the contiguous U.S.

The trip would only make stops at National Natural Landmarks, National Historic Sites, National Parks, or National Monuments.