What happens when ice melts in the Roopkund lake? When ice melts in the glacial tarn of Roopkund, located 5,000 metres above sea level in Chamoli district, Uttaranchal, hundreds of corpses can be seen floating. Thus gets exposed a mystery that dates back to more than 60 years and has begun to be understood only recently. In 1942, a forest guard chanced upon hundreds of skeletons at this tarn. The remains have intrigued anthropologists, scientists, historians and the local people ever since. Who were these people? What were they doing in the inhospitable regions of the Garhwal Himalaya?