Jammu is a city in Indian-administered Jammu and Kashmir in the Jammu region. It is the winter capital of the union territory of Jammu and Kashmir. It is the headquarters and the largest city in Jammu district. Lying on the banks of the river Tawi, the city of Jammu, with an area of 240 km2 (93 sq mi), is surrounded by the Himalayas in the north and the northern plains in the south. Jammu is the second-most populous city of the union territory. Jammu is known as "City of Temples" for its ancient temples and Hindu shrines.