Nallamala Forest is located in the Indian state of Andhra Pradesh and Telangana.  

• It is part of the Eastern Ghats.  
• Nagarjunsagar-Srisailam Tiger Reserve the largest tiger reserve in India and spread over five districts of Kurnool, Prakasam, Guntur, Nalgonda and Mahabub Nagar falls under it. 

Source: https://www.newindianexpress.com/states/andhra-pradesh/2021/apr/13/water-bodies-in-nallamalas-drying-up-2289374.html