What is "roopkund"

Roopkund (locally known as Mystery and Skeletons Lake) is a high altitude glacial lake in the Uttarakhand state of India. It lies in the lap of Trishul massif and is famous for the hundreds of human skeletons found at the edge of the lake. The area is uninhabited, in the Himalayas at an altitude of 5,029 metres (16,499 feet). Surrounded by rock-strewn glaciers and snow-clad mountains, the lake is a popular trekking destination. A shallow lake, having a depth of about two metres, Roopkund has attracted attention because of the human skeletal remains that are visible at its bottom when the snow melts. Many theories and opinions exist, from purely spiritual to scientific ones, attempting to explain the existence of these skeletons, which date back to 9th century CE. Because of the human remains, the lake has been called Skeleton Lake in recent times.