Hyderabad is south of Delhi, southeast of Mumbai, and north of Bangalore by road. Situated in the southern part of Telangana in southeastern India, along the banks of the Musi River, located on the Deccan Plateau in the northern part of South India. Greater Hyderabad covers , making it one of the largest metropolitan areas in India. With an average altitude of , Hyderabad lies on predominantly sloping terrain of grey and pink granite, dotted with small hills, the highest being Banjara Hills at . The city has numerous lakes referred to as sagar, meaning sea. Examples include artificial lakes created by dams on the Musi, such as Hussain Sagar (built in 1562 near the city centre), Osman Sagar and Himayat Sagar. As of 1996, the city had 140 lakes and 834 water tanks (ponds).