Nandi Hills or Nandidurg is a hill fortress of southern India, in the Kolar District of Karnataka state. It is located just 3 to 5 KM from Chickballapur Taluq. It is 4851 ft. (1478 meters) above sea level. Nandidrug hill, known commonly as Nandi Hills, is the source of the Penner,Ponnaiyar and Palar rivers. Nandi Hills gets its name from an ancient Nandi temple situated on this hill. This temple has a thousand year old sculpture of Nandi. An ancient lord Shiva and Parvati temple also adorns this hill.