Contiguous with the proposed Karimpuzha National Park ( 225 sqkm ) to the north and Mukurthi National Park (78.46 km 2 ) to the north-east, it is the core of the Nilgiri Biosphere Reserve (1,455.4 km 2 ), and is part of the Nilgiri Sub-Cluster (6,000 + km 2 ), Western Ghats World Heritage Site, recognised by UNESCO in 2007.