Kotumsar cave is a limestone cave located near Jagdalpur in the Indian state of Chhattisgarh. Kotumsar cave is a major attraction for people interested in ecotourism. It was initially named Gopansar cave (Gopan = hidden) but the present name Kotumsar became more popular as the cave is located near a village named ‘Kotumsar’. Kotumsar cave formed on the Kanger limestone belt, situated near the bank of the River Kanger, a tributary of the Kolab River.