<Tr> <Th> Extensions </Th> <Td> 2005 </Td> </Tr> <P> The Nanda Devi National Park, established in 1982, is a national park situated around the peak of Nanda Devi (7816 m) in the state of Uttarakhand in northern India . The entire park lies at an elevation of more than 3,500 m (11,500 ft) above mean sea level . </P> <P> The National Park was inscribed a World Heritage Site by UNESCO in 1988 . The latter was expanded and renamed to Nanda Devi and Valley of Flowers National Parks in 2005 . </P> <P> Within the National Park lies the Nanda Devi Sanctuary, a glacial basin surrounded by a ring of peaks between 6,000 metres (19,700 ft) and 7,500 m (24,600 ft) high, and drained by the Rishi Ganga through the Rishi Ganga Gorge, a steep, almost impassable defile . </P>

When was nanda devi national park added to the unesco's list of world heritage