Under the royal Alcázar in Seville, Spain, are the Baños de Doña María de Padilla (Baths of Lady María of Padilla). This underground rainwater reserve is a popular tourist attraction, however, on the day that Bill Mills visited, the baths were entirely empty. “That was the beauty of this place …” says Mills, “that no one was there. I had the place to myself, and how often can you say that?” It was here that he took his Sunset Print Award-winning photo Golden Arches. “You’re not allowed to use tripods in this area, but around this bath was a wall, and so I set my camera there on a two-second delay and shot a couple of different angles,” he says. His image eloquently captures the eerie tranquility of the architecture, earning him this prestigious award. According to Mills, he got a late start in photography. “I was a business guy. I retired in 2009 from a major consumer goods company,” he says. “I was the neighborhood photographer. I always loved to capture expression and...