Arco was the first community in the world ever illuminated by electricity generated by nuclear power. (A reactor melted down in 1961, causing the world’s first fatal reactor accident.) Yet the most striking physical feature of the town is Number Hill, a rocky hill with numbers painted all over it. Since 1920, Butte County High School has made a tradition of asking each class to paint its graduation year on the face of the hill. In this portrait of Number Hill, I was able to combine the painted numerals symbolizing the memories of man upon a work of nature at the very moment that nature itself was also painting the hill with dappled light and shadow.