Kalavantin durg is located right next to Prabalgad Fort on the old Mumbai Pune route. This was used as a watch tower. The thrill of an exposed climb via amazing zig-zag rock cut steps and steep slopes is beauty of this trek. One can get a panoramic view from the top which includes Prabalgad, Chanderi, Peb Matheran, Irshalgad and Ulhas river.