In 1934 two prolific explorers Eric Shipton and Bill Tilman from England discovered a route to enter the Nanda Devi Sanctuary through the formidable Rishi gorge .River Rishi Ganga which drains this great basin emerges to the west in one of the most spectacular gorges in the world.In this ring of mountains are at least twelve peaks over 21,500 ft/ 6500 metres including several famous names such as Changabang and Dunagiri to the North and Trishuli and Nanda Kot to the West and South. In the centre is the goddess mountain – Nanda Devi. At 25,643 ft/ 7816 metres this is the second highest peak in India.In 1983 the Indian government closed the Sanctuary to regenerate the basin after the inevitable damage caused by expeditions and shepherds who were also finding their way in.