 Although some of the larger atolls are approximately long from north to south, and wide from east to west, no individual island is longer than eight kilometers.The Maldives has no hills, but some islands have dunes which can reach above sea level, like the NW coast of Hithadhoo (Seenu Atoll) in Addu Atoll.The islands are too small to have rivers, but small lakes and marshes can be found in some of them.