In and around Nandyal and Mahanandi, at the foot of the Nallamala hills in Andhra Pradesh, stand nine ancient shrines of Lord Shiva, each bearing the name of Nandi, the Lord's sacred bull. Together they are known as the Nava Nandis or Nava Nandulu, and the whole region is called the Nandi Mandala. The town of Nandyal itself is said to take its name from them.
All nine shrines lie within about 15 km of one another, and devotees try to visit all of them in a single day, especially during Maha Shivaratri (usually February–March) and the holy month of Karthika (usually October–November).