It also includes the oldest urban area in the USA, Presidio, founded by the Spaniards to guard the ford over the Rio Grande. Because of its shape, and the natural proximity of the State of Oklahoma along its northern edge, combining the two States just made sense. The map is presented double-sided (top half/bottom half) on waterproof paper that is durable and tear-resistant. There was not as much room for inset maps as we had hoped, but good-sized urban map of Amarillo, Tulsa, and Oklahoma city are included. Scale 1:1.300.000.