Maldives
The Maldives holds the record for being the lowest country in the world, with a maximum natural ground level of only 2.3 m (7½ ft) with the average being only 1.5 m above sea level, though in areas where construction exists this has been increased to several metres.
The reef is composed of coral debris and living coral. This acts as a natural barrier against the sea, forming lagoons. Other islands, set at a distance and parallel to the reef, have their own protective fringe of reef. An opening in the surrounding coral barrier allows access to the calmer lagoon waters.
(Wikipedia)
