When I decided to explore the western region of Organ Pipe Cactus National Monument, I did not expect my first photo to be of a 1957 Cadillac just a few feet from me across the border. I had just pulled off Highway 85 onto South Puerto Blanco Drive just a few blocks north of the Mexican border. Puerto Blanco Drive runs along the border for a few miles and visitors can peer into back yards of folks living west of Sonoyta, Sonora, Mexico. This particular Cadillac was sitting just a few feet from the border fence in the back yard of an auto shop.