Historical Features are physical or cultural features that are no longer visible on the landscape. Examples: a dried up lake, a destroyed building, a hill leveled by mining. The term makes no reference to the age, use, or any other aspect of the feature. A ghost town, for example, is not a historical feature if it is still visible.
Island - Area of dry or relatively dry land surrounded by water or low wetland (archipelago, atoll, cay,
hammock, hummock, isla, isle, key, moku, rock).