Kabi Lungchok is an important site of historical significance; it is located 17 km north of Gangtok on the Northern Sikkim Highway. The historicity of the site is attributed to the fact that the Lepchas, the ethnic tribal’s of Sikkim and Bhutia’s (ethnic Tibetans), the immigrants from Tibet who settled down in Sikkim from the 14th century onwards, ceremonially signed a "Treaty of Blood Brotherhood" with religious fervor.
Stone pillars mark the location where the treaty was signed. The Treaty was signed at Kabi Lungchok by the Tibetan King, Khye Bumsa representing the Bhutia’s and the Lepcha Chief Thekong Tek. The literal meaning of 'Kabi Lungchok', pronounced ‘Kayu sha bhi Lungchok’, is "stone erected by our blood. Life-size statues of the Lepcha and Bhutia 'blood-brothers' who signed the treaty has been erected as a marl of respect.