Though much modern salt is produced in industrial quantities, with little concern given to finesse or flavor, this wasn’t always the case. Indeed, for centuries, salt was a distinctly local product, an expression of both terroir and technique—Hawaii’s blood-red crystals, for example, or the gray, pebbly salt of France’s western coast. A few entrepreneurs are looking to recapture that sense of place (and taste) and even turn salt from a sprinkled afterthought into an essential part of your diet. Here, our four favorite gourmet varieties from around the world.