The cave supports a rare, endemic subterranean ecosystem including blind, pigmentless fish and crustaceans.
It is a true karst cave formed by the erosion of limestone by underground water channels.
The cave remains in total darkness, requiring artificial lighting or flashlights to navigate.
The interior temperature remains relatively constant year-round despite external weather fluctuations.
It was scientifically explored and documented extensively by the geographer Dr. Shankar Tiwari in the 1950s.
Kotumsar Cave is an underground limestone cavern system located within the Kanger Valley National Park in Chhattisgarh. It is renowned for being one of the deepest caves in India, featuring a multi-chambered structure characterized by unique stalactite and stalagmite formations. The cave is biologically significant, home to the blind fish species Nemacheilus evezardi, which has evolved to survive in total darkness. Visitors access the subterranean environment via a steep, narrow descent that leads into a humid, low-ceilinged network of tunnels. The cave experiences seasonal flooding, which dictates its accessibility for public tours. It remains an active karst system carved by the subterranean flow of the Kanger River.
The main chamber where light filters through small fissures or at the entrance portal for scale.
Wear sturdy, non-slip footwear as the cave floor is perpetually damp, muddy, and uneven.
Carry a powerful headlamp or torch, even if accompanied by a guide, to better observe rock formations.
Avoid touching the stalactites and stalagmites, as natural oils from human skin can inhibit their growth.
Avoid visiting during the rainy season when the cave becomes waterlogged; do not attempt to enter without a licensed local guide.
Closed annually during the monsoon season (typically July to October) due to flooding risks.
Do not litter, avoid making loud noises to protect the cave's sensitive bat population, and follow the guide's path strictly.
