Nagarjuna Sagar, an erstwhile prominent Buddhist center, is the most attractive tourist spot in Andhra Pradesh. Named after the Buddhist monk, Acharya Nagarjuna, it is today the major hydel power station in Andhra Pradesh. It is the tallest masonry dam in the World, constructed on the river Krishna. Nagarjuna Sagar dam is located on the border of Guntur - Nalgonda districts.
The dam was completed in 1966 and it is 124 metres high and 1 km long. It is built across the river Krishna and has one of the largest networks of canal systems irrigating over 2,000,000 acres of land in Guntur, Prakasam, Nalgonda, Khammam and Krishna districts. 4 kms away from the dam, is the viewpoint, where a panoramic view of the amazing landscape, is simply a feast to the eyes. One can find the image of Nagarjuna, on a pylon not too far from the dam.