Edgar Romo of Costa Mesa shot this river of ice moving down from the Andes in Argentina. The Perito Moreno glacier, one of the nation's great tourist draws, crawls along at about 2 inches per month. "The rumble is so impressive that you are not able to sleep at night," Romo says. The ice piles on itself as it reaches Argentina's largest lake, where it forms an ice dam and eventually breaks up. Romo reports that Perito Moreno is one of the few glaciers that is advancing, not retreating. He used a Sony A100 for the shot.