Droogs are steep rocks which dot the surface of Mysore and Tamil Nadu, India. The rocks are prominent monoliths and may resemble hay-ricks, some of which are 1,500 ft (460 m) high, and some of which have springs on the top. They provide formidable sites for fortification because most are scalable only by steps cut in them. There is a famous droog at Tiruchiripalli in Tamil Nadu, also known as the Rock Fort. This is climbed by 434 steps cut into the rock face. Temples to Ganesha and Shiva have been built there.Droogs were used as sites for his theodolite by Colonel William Lambton while Superintendent of the Geological Survey of India in the 19th century. The survey was completed by Sir George Everest (pron eeve-rest)for whom Mount Everest is named.The survey, commissioned by the East India