Hyderabad is situated at the Deccan Plateau, 500 meters above the sea level and most of the area is rocky. Paddy is the main crop grown and other crops include Bengal gram, groundnut, sugar cane and sunflower. Hyderabad was found on the banks of Musi river in 1591. Today that area is known as old city where Mecca Masjid and Hussain Sagar Lake exist. The area has many official buildings and that area is very old. From the recent time, Hyderabad has been merged with Secunderabad. This has led a large, united and populous city with many villages surrounding it.