Rose water has many uses but isn't always easy to find. Given that it's a common ingredient in Middle Eastern cooking, finding it at a store that specializes in international foods may be easiest. If no such store is available, many chain grocery stores have an international section where you may find the rose water. It may also be available at health food or natural food stores such as Trader Joe's or Whole Foods. If none of these stores are located in your area, you can always buy rose water online. Be sure to check the ingredients as some rose water is sold to be used on the skin rather than for cooking.