Prabalgad Fort, also known as Kalavantin Durg (Kalavantin’s Fort), is located between Matheran and Panvel in the Indian state of Maharashtra, at an elevation of 2,300 feet in the Western Ghats. It is located on a plateau very close to Matheran, but unlike Matheran Prabalgad fort does not have a good source of water supply.
It was known as Muranjan until it was taken over and renamed by the Maratha forces under Shivaji’s rule.
The steps leading up to the fort were cut into the rock of the hill, a very impressive feat. If this geological formation was present in many other countries it would be fenced off and no one would be allowed to climb it.
At the top of Kalavantin Durg you can see the Peb, Chanderi, Matheran, Karnala, and Ershal forts. The city of Mumbai itself can also be seen. It is believed that the Fort was built around the time of Buddha or around or before 500 BCE.
Technically this fascinating place is abandoned in the sense that it is not used for its original purpose, but it gets visits from tourist and locals often and is easily accessible from the Mumbai-Pune Expressway.