Bhatner Fort is one of the oldest forts in India, believed to date to the 3rd century AD, though the current structure reflects centuries of rebuilding and repair. It stands on a slight elevation above the Ghaggar river at the edge of Hanumangarh town, its brick walls and bastions still largely intact. The fort was a significant stronghold on the medieval trade and invasion routes between Multan and Delhi, and its strategic position on the Ghaggar explains why it was fought over so persistently.
The interior contains a Hanuman temple that gives the town its modern name (Hanumangarh means "Fort of Hanuman"), along with the remains of palaces, granaries, and water cisterns. The fort is officially protected but maintenance has been inconsistent. Visit in the morning before the heat builds, and bring your own water. The views from the walls over the river floodplain and the flat countryside give a clear sense of why this position mattered militarily.