Is a bowl-shaped glacial valley on the western slopes of black mountain. Every winter from mid of oct the  Black Neck cranes or Heavenly birds(known locally as throng throng  kam) flocks here from Plateau  of Tibet .it is one of the most importen wild life preserves  area in the country.the Nakey chhu drains the marshy valley,famous  places to visits are, Gangte Goemba( monastery school),Black-Necked Crane information center, Khewang Lhakhang( Old Temple),there’s some great hiking in the valley, Gangte Nature Trail(1 .1/2 hours).