Hyderabad, the pearl city of India, is the capital of Telangana in Southern India. It sits on the banks of the Musi River and on the Deccan Plateau. Hyderabad and Secunderabad are 'twin cities' near Hussain Sagar Lake (also known as Tank Bund in local parlance) but both cities have grown so much that now they have become one big metropolis. The city and district of Hyderabad are coterminous. Hyderabad district is entirely contained within the Ranga Reddy (formerly 'Hyderabad Rural') district of Telangana. Many of the suburbs of Hyderabad have been merged into the city, now called Greater Hyderabad.