arid, barren, blue, calcium sulfate, dawn, day, desert, distance, dry, dune belt, dune field, dunes, dusk, environment, erosion, field, gypsum, harsh, horizon, landscape, morning, mountains, national monument, natural, nature, new mexico, outdoor, outside, park, pink, pristine, remote, ridge, rippled, sacramento mountains, san andres mountains, sand, sand dune, scenic, sky, smooth, southwest, steep, summit, sunrise, sunset, texture, tourism, undulating, unique, united states, unmarked, usa, vacation, west, white, white sands, wilderness