As the Yangtze River flows past this city into the Pacific Ocean, Nantong in east China's Jiangsu Province is known as the "gateway to the rivers and seas." Nantong is a city of museums, with over 20 diverse museums lined along Haohe River, each with its own distinctive character, such as the China Abacus Museum, the Nantong Blue Calico Museum, and others. The Five Mountains Area by the Yangtze River Estuary (named for its five mountains) is a model of ecological conservation along the Yangtze River. It has become an ideal location to view the surging waters of the Yangtze River as they flow eastward into the sea.