Galle is a district in Southern Province, Sri Lanka. It is one of 25 districts of Sri Lanka, the second level administrative division of the country. Its area is 1,652 km2 (638 sq mi): 35 km2 (14 sq mi) is water and 1,617 km2 (624 sq mi) is land. Galle District bounded on the north by Benthara river, south and west by the Indian Ocean and east by Matara and Ratnapura districts. The topography of Galle District is very much dissent. The climatic condition of Hiniduma Patthuwa is very similar to the central hill country of Sri Lanka. This area consists of rainforests, which is the water catchment area for most of the rivers and lakes flows across Galle District. Sinharaja Forest Reserve is one of them. Galle district lies in a temperate climatic zone.