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.
Summit - Prominent elevation rising above the surrounding level of the Earth's surface; does not include
pillars, ridges, or ranges; can occur as a single isolated mass or in a group (ahu, ballon, berg,
bald, butte, cerro, colina, cone, cumbre, dome, head, hill, horn, knob, knoll, mauna, mesa,
mesita, mound, mount, mountain, peak, pu?u, rock, sugarloaf, table, volcano).