STS052-094-075 Niihau, Hawaii, U.S.A. October 1992 Niihau, part tableland and part low coral formation, has its highest elevation, 1281 feet (390 meters), along the eastern side of the island. Infrared film, on which green vegetation is portrayed in shades of red, indicates a considerable amount of vegetation throughout the island. Two lakes appear in the southern third of the island. Kaulakahi Channel separates Niihau from the western side of Kauai.