white sands national park with gypsum dunes along alkali flats trail, southwest desert landscape, new mexico

blue wave white azure wind sands national park gypsum dunes alkali flats trail southwest desert landscape mexico early evening light brings ripples sand structure heart dune field protected alamogordo southern usa nature natural environment sanddunes windy shifting sands ridges crests outdoors hike hiking hardpan vegetation dry arid monument sun sunlight shadows patterns scenery beautiful serene remote empty barren tourist destination attraction Southwest Southwestern west western American United States North America