Most of the Shan State is a hilly plateau, the Shan Plateau, which together with the higher mountains in the north and south forms the Shan Hills system. The gorge of the Thanlwin (Salween/Namhkong) River cuts across the state. The famous Inle Lake where the leg-rowing Intha people live in floating villages, in the great Nyaung Shwe 'plain', is the second largest natural expanse of water in Burma, shallow but 14 miles (23 km) long and 7 miles (11 km) wide. Pindaya Caves near Aungban are vast limestone caves which contain 6226 Buddha images.