Qiandao Lake, also known as Thousand Island Lake, is a large artificial lake located in Zhejiang Province, China. It was created in the 1950s when the Xin'an River was dammed for hydroelectric power. The lake covers an area of approximately 573 square kilometers and is famous for its clear blue waters and over a thousand islands. The lake is a popular tourist destination, offering activities such as boating, fishing, and hiking. Visitors can explore the scenic beauty of the islands, many of which are home to lush forests and diverse wildlife. Qiandao Lake is also known for its unique underwater attractions, including submerged ancient towns.