Savandurga hill is 60 km west of Bangalore off the Magadi road Karnataka, India. The hill is considered to be among the largest monolith hills in Asia. The hill rises to 1226 m above mean sea level and forms a part of the Deccan plateau. It consists of peninsular gneiss, granites, basic dykes and laterites. The Arkavathi River passes nearby through the Thippagondanahalli reservoir and on towards Manchanabele dam.

Savandurga is formed by two hills known locally as Karigudda (black hill) and Biligudda (white hill). The earliest record of the name of the hill is from 1340 AD by Hoysala Ballala III from Madabalu where it is called Savandi. Another view is that the name is originated from Samantadurga attributed to a Samantharaya, a governor under Ahchutaraya at Magadi, although there is no inscription confirming this.

Megalithic burial urns have been found in the area. Saavana in Sanskrit also means three time rituals.

Savandurga Hills serve as the base for pilgrims who come to visit the Savandi Veerabhadreshwara Swamy temple and Narasimha Swamy temple, situated at the base of the hills.

The hills are home to the endangered yellow-throated bulbuls and were once home to long-billed vultures and white-backed vultures. Other wildlife include sloth bear and leopard.

Source:

https://en.wikipedia.org/wiki/Savandurga

http://www.mouthshut.com/product-reviews/Savandurga-reviews-925073256

http://talkofwalk.blogspot.in/2013/01/enchanting-savanadurga-bangalore.html