The beautiful hill state of Sikkim lies on the eastern tip of the Himalayas bordered by Bhutan, Nepal and Tibet. Sikkim is famous for Kanch-Endzonga, at 598 meters, which is third highest mountain in the world. Being second smallest state in India, Sikkim covers 7,096 sq kms and measures 110 kms from north to south and 64 kms from east to west. It encompasses the upper valley of Teesta river, a tributary of the Brahmaputra. The watershed form the borders with Tibet and Nepal. Rangit and Rangpo rivers form the border with West Bengal. Sikkim is separated from Nepal in the west by the Singalila range while Donngkya range is the border to the north & north-east. Sikkim is broadly divided into four districts. The east district with capital city of Gangtok is the hub of all administrative activity. The famous Rumtek Monastery, the Dharma Chakra Centre and the seat of his Holiness Gyalwa Karmapa, all are located here. Other places of interest include the Tsomgo Lake and the Nathula Pass.