The "map" is the usual cartoon ribbon of black paint as the highway. One wall labels major (for Route 66) cities from the west coast east to Chicago. The other, more Arizona-focused mural emphasizes the importance of petrified wood in the sweeping pageantry that is Route 66 -- after all, Holbrook is Petrified Wood Central. As with most mural maps, don't trust scale, distance, or north-south orientation. "Home of Gertie" the dinosaur may be further from the "Agate House" than is suggested here.