Nagarjunsagar-Srisailam Tiger ReserveNagarjunsagar-Srisailam Tiger Reserve is the largest tiger reserve in India . The reserve spreads over five districts, Kurnool District, Prakasam District, Guntur District, Nalgonda District and Mahabub Nagar district. The total area of the tiger reserve is 3,728 km2 (1,439 sq mi).