hyenas, bears, bats, fishes, snakes, frogs, crickets etc. The overhangs are mostly found in the western part (Tirathgarh) and eastern portion (Near Kolab River) of the national park which provide a good habitat for honeybees especially the rock bees. Dens are found on the rocky portions of the National park where wild dogs (dholes), jackals, wolves, foxes, mongoose, etc. occupy them for shelter and breeding. Cliffs are present in Tirathgarh waterfall area and in the western portion of the national park along the Kanger River and Kolab River. They provide ideal habitat for bats, eagles, pigeons, swifts and some reptile species. The bouldery drainages can be seen at Tirathgarh waterfall region, Kanger Dhara and at points where the Kanger River flows from steep height. Sand banks are observed along the Kanger River especially at points where the Kanger River takes a curve. Sand banks are seen at Bhainsadarha located on the eastern portion of the national park where mugger crocodiles (Crocodylus palustris) use it for basking purposes. Smooth Indian otters are also found using this habitat. Kanger River Kanger River is among very few perennial rivers of Bastar, and herein lies the importance of the river and the park. Kanger River is a lifeline and hills are its recharging reservoir; the whole national park is the catchment of Godavari River. Limestone caves The Kanger Valley National Park has huge limestone deposits where some of them are in the form of caves and the rest of it are in the form of layers or beds one upon the other. These deposits are present above the soil as well as under the ground level. The underground portions form the caves. The national park is known for the long subterranean geomorphological limestone caves and is a major tourist attraction in the region. All limestone caves are present north of Kanger River between Madarkonta and Kodri Bahar. These are Kotamsar cave, Kailash Cave, Dandak Cave, Devgiri Cave. Many other caves were also discovered in the national park. These caves have very fine structures of dripstones i.e. stalactites and stalagmites. Chemically these formations are recrystallized calcium carbonate. These structures have taken million of years to form. Kotamsar and Kailash caves are opened for tourists and other caves are closed for tourists. Only those caves which have openings have been discovered in the National park. There are many caves which have no opening and they are