Apart from the capital Colombo, are important cities along the south-western coast Negombo, Dehiwala-Mount Lavinia, Galle, Matara, in the interior of the country is the city of Kandy, Jaffna lies in the north, and along the east coast are the ports of Trincomalee and Batticaloa. The island, mostly flat, consists of large coastal plains, the northern part is flat and covered with savannahs, and the only mountainous area of the country is the central-southern zone, made up of plateaus and mountain that rise above 2,000 meters, here are the Adams Peak (Sri Pada, 2243 meters) and Pidurutalagala, the highest mountain in Sri Lanka (2,524 metres). The largest river of Sri Lanka is the Mahaweli Ganga (332 km). At the base of Sri Lanka economy is agriculture, among the most important crops are rice, tea (one of the leading world producers), rubber, palm trees (nuts, oil and copra), spices (cardamom, citronella, pepper, cinnamon), cassava, batata, tobacco, cotton, coffee, vegetables and fruit. Important are the production of timber and fishing. Resources of subsoil are poor (graphite, precious stones (rubies, sapphires, beryl, topazes). Industry is largely related to the processing of agricultural products and textile industries. Important is tourism.