Pennyfield Lock is Lock 22 on the C&O Canal in Maryland. Pennyfield's Inn stands guard over the lock, and the inn still operates today. You can rent it for a night or two from the National Park Service, as long as you don't mind having no electricity or running water. As it happens, two nice travelers named Steve and Jennel were staying there while I was painting the house, and I added them to the picture; they're hanging out at the fence. They liked the painting and bought it from me off the easel.