The Nagarjunasagar Wildlife Sanctuary has also been one of the largest wildlife habitations in the country. With an area of 356,000 hectares and sprawling over five districts of central Andhra Pradesh, the Nagarjunsagar-Srisailam Tiger Reserve (NSTR) is the largest tiger reserve in the country.

Off the regular tourist circuit, a visit to the Nagarjunsagar-Srisailam Tiger Reserve helps in gaining a closer look into a forest that was almost given up as lost until a few years ago.

A little over 6 sq km in area, the Rollapadu grasslands near Srisailam are dotted with dry, thorny bushes and is home of about a hundred blackbucks. From a distance, one can observe families of blackbucks out on their breakfast trail, a couple of bustards gazing at the horizon while taking a tentive foot forward.

At present, day visits to Rollapadu Sanctuary is permitted.

November to March is the best time to visit.