The correct answer is Ratanpur. The fort situated in Ratanpur of Chattisgarh state is known as 'Gaj Kila'. This magnificent fort was built on a plateau which was surrounded by ponds from all three sides along with a strategic location that had connectivity and a nearby forest for the army cantonment. The fort includes large walls to protect them from invaders and fencing around the fort. The fort has four grandeur entrances named Simha, Ganesh Bhairav, and Semar dwar. The walls of the fort had several carvings of sculptures including gods and goddesses. Additional InformationRatanpur was the historical capital of Chhattisgarh until the British takeover of Central Province from Maratha. Ratanpur is a town and a Nagar Palika in Bilaspur district in the Indian state of Chhattisgarh. It is located about 25 kilometers (16 mi) from Bilaspur on National Highway 130 towards Ambikapur.