Suzhou is a major city in the southeast of Jiangsu Province in Eastern China, adjacent to Shanghai Municipality. The city is on the lower reaches of the Yangtze River and on the shores of Taihu Lake and is a part of the Yangtze River Delta region. Administratively, Suzhou is a prefecture-level city with an urban population of over 4 million in its core districts. With its administrative area expanding to over 10 million of population as of 2010, Suzhou is the ninth most populous city in mainland China. It is considered one of the richest major cities in China. The city's canals, stone bridges, pagodas, and meticulously designed gardens have contributed to its status as one of the top tourist attractions in China. The classical gardens in Suzhou were added to the list of the UNESCO World Heritage Sites in 1997 and 2000. Suzhou is often dubbed the "Venice of the East" or "Venice of China".