Nandi Hills (Anglicised forms include Nandidurg and Nandydoorg) is an ancient hill station built by Ganga Dynasty in the Chikkaballapur district of Karnataka state. It is 10 km from Chickballapur town and approximately 60 km from Bengaluru. The hills are near the town Nandi. In traditional belief, the hills are the origin of the Arkavathy river, Ponnaiyar River, Palar River, Papagni River and Penna River. Watching the sunrise at Nandi Hills is popular with tourists. The first ever SAARC summit hosted by India was held at Nandi Hills in 1986. Etymology There are many stories about the origin of the name Nandi Hills. During the Chola period, Nandi Hills was called Anandagiri meaning The Hill of Happiness. It is also perhaps called Nandi Hills because the hills resemble a sleeping bull. Another theory holds that the hill gets its name from an ancient, 1300-year-old, Dravidian-style temple, and for the Nandi (bull), statue situated on this hill. History Nandi Hills was developed by Ganga Dynasty in 11th century. It was also used by Tipu Sultan as a summer retreat. Nandidurga was traditionally held impregnable, and its storming by the army of Cornwallis on 19 October 1791 was one of the most notable incidents of the first war against Tipu Sultan of Mysore. A description of the siege is given in Browne's History of Scotland and the records of the 71st Highlanders. It later became a retreat for British Raj officials during the hot season. Francis Cunningham built the summer residence here for Sir Mark Cubbon. The climate at the top of the hill made it of interest to horticulturists. Several species of plant were introduced into an experimental garden. Firminger's manual notes that several species of Anona were grown at this garden and also notes the peculiarity of Hypericum mysorense: Potato cultivation was introduced for the first time in the neighbourhood of Bangalore by a Colonel Cuppage and continued by the botanist Benjamin Heyne. Heyne brought seeds from St. Helena and these grew well enough that they were supplied in Madras and preferred to those obtained from Bengal. In 1860, tea plants were tried on Nandi Hills by Hugh Cleghorn. Development The Department of Horticulture is setting up a one-crore food court. A 30-lakh music stage, located on a three-and-a-half acre grove, will be used to conduct cultural programmes. Furthermore, the Horticulture Department is developing of land in the Nandi Hills