Agnigarh refers to fire fort or a residence amidst fire. Agnigarh, the big fortress on hilltop, was constructed to isolate King Bana’s daughter Usha, from Lord Krishna’s grandson Anirudha. As it was surrounded by fire on all sides, it was named Agnigarh. To reach the fortress, you need to climb the circular staircase. From the hilltop, you could have splendid views of Tezpur and the River Brahmaputra.