The National Natural Landmarks Program annual photo contest is now accepting entries, through June 30. "We're looking for images that capture the beauty and diversity of these natural areas," said National Park Service director Jonathan B. Jarvis. Each photographer can submit up to three entries. Winning photographs, announced in September, will be featured in the 2013 National Natural Landmarks calendar. For full contest information and submission requirements visit nature.nps.gov/nnl/photocontest.cfm.