Wind and sand create majestic dunes that are constant but ever-changing. The accumulation of windblown sand marks the beginning of one of nature's most interesting and beautiful phenomena.
Sand dunes occur throughout the world, from coastal and lakeshore plains to arid desert regions.
In addition to the remarkable structure and patterns of sand dunes, they also provide habitats for a variety of life which is marvelously adapted to this unique environment. Picturesque dunes against a sky of blue or a full moon, with perfectly contoured shadows of ripples and undulating crests, have always been a favorite subject of photographers. Dunes have also been the subject of many desert movies, and have historically been a formidable barrier to vehicular and rail travel. Depending upon one's particular situation, they can be one of the most incredibly beautiful, thrilling, eerie, treacherous or just plain inhospitable places on earth. A wind energy source sufficient to move the sand grains 3.