Stock photography, photos: Keep Off Sand Dunes Stock photos of A sign warns to Keep Off Sand Dunes. Sand dunes are an important protective and environmental area. Photograph: © Dan Creighton Click for a larger image and more information Keywords associated with this stock photo: danger, structures, EQUIPMENT/OBJECTS, CATEGORIES, warning, sign, architectural, concept, concepts, habitat, environmentalism, ecology, communication tools, architecture, ecosystem, landscape, fence, environment, conceptual, fenced, dangers, nature, beach, dangerous, trespass, shore, scenery, dune, restriction, action motion, trespassing, land, fencing, restricted, security, restrictions, ACTIVITIES/ACTION, sand, scenic, sun rays, skies, sundown, clouds, cloud, sunrise, inspirational, IMAGE/COLOR/STYLE/FORMAT, daybreak, sunrises, colorful, suns rays, sunset, style, inspiration, bright, TIME OF DAY, warm, sky, sun up