When we are way up in the mountains, in high altitude and thin air, our GPS decides to set itself on Sherpa Mode. It carefully maps a route that is Longest, Obscure, and Steep Terrain - L.O.S.T.
Such as the day we travelled from Asheville, NC to Renfro Valley, KY. When we left camp in NC, a simple turn to the right would have led to the highway in a couple of easy miles, but instead the GPS sent us to the left. So we traversed the Appalachian Mountains on the back roads for two hours: though hill and holler, over dale and dell, around switchbacks and hairpin turns. All in the motorhome.