I prefer to fly cross country above the haze layer. I know that many general aviation pilots never venture up high even when flying cross country so here are some pictures and commentary from a recent Atlanta/Miami trip.
Above the haze layer, the horizontal visibility is excellent as can be seen in this picture. My plane is a Long EZ. The wing you see is the canard (the front wing). This picture was taken at 10,500' somewhere in Florida heading to Miami.