geography
	: Sri Lanka is a pearl-shaped Island nation in South Asia, lying on the Indian Plate, a major tectonic plate that was formerly part of the Indo-Australian Plate. Sri Lanka has 103 rivers. The longest of these is the Mahaweli River, extending 335 kilometres (208 mi).[150] These waterways give rise to 51 natural waterfalls of 10 metres (33 ft) or more. Sri Lanka's coastline is 1,585 km (985 mi) long