The Maldives is a coral atoll chain formed by minor elevations just on the Chagos-Lacadive underwater plateau, which rises from the deep Indian Ocean. The plateau has served as a home for reef-building corals, which have soared to the surface. There are approximately 1,190 coral islands in total, divided into 26 atolls (200 populated islands plus 80 tourist resort islands), with an elevation range of about 1.6 meters above sea level.
They are all surrounded by lush reefs, which provide the only protection from rough seas. The islands are mostly flat, with only a few mounds. There are no mountains, hills, or rivers. Some of the larger islands have small freshwater lakes, while others have saltwater with mangroves growing along the edges. The lowest point is 0m in the Indian Ocean, and the highest point is 2.4m high.