Peninsula, Southeast Asia. Comprising the mainland portion of Malaysia and southwestern Thailand, it occupies an area of 70,000 sq mi (181,300 sq km), has a width of 200 mi (322 km), and extends south for 700 mi (1,127 km) to Cape Balai, the southernmost point of the Asian continent; the island country of Singapore lies just south across the Johore Strait. Its central mountain range, rising to 7,175 ft (2,187 m) at Mount Tahan, divides the peninsula lengthwise and is the source of many rivers. Both its western and eastern coasts are exposed to monsoons. It has large tracts of tropical rainforest and is a major producer of rubber and tin