Nallamala Hills located in Eastern Ghats have rocky terrain and surrounded by dense forests. The Srisailam Dam is main attraction of the region. Srisailam Lord Shiva Temple, Ahobilam Navanarasimha Temple and Mahanandi Temple are much sought after pilgrim centers in Nallamala Hills.
You should miss out the sacred pool called Nemaligundam and Mallela Tirtham waterfalls while visiting this region. Sunflowers all cultivated in Cumbum region on large scale and makes that region most picturesque. The Lake of Cumbum is one of the oldest man-made lakes and it dates back to 15th century.
Many parts of these ranges are still unexplored and have tribal settlements in hilly region, which are unwilling to take-up civilized life.