Famous for its historic relics and natural beauty Hangzhou ranks as one of the most beautiful and scenic cities in China. Tourism is an important factor for its economy and one of Hangzhou's most popular sights is the West Lake, a UNESCO World Heritage Site. The West Lake Cultural Landscape covers a huge area and includes some of Hangzhou's most notable historic and scenic places. Adjacent to the lake is a scenic area with historical pagodas, cultural sites, as well as the natural beauty of the lake and hills. Other places of interest include the world's largest tidal bore, the residence of Hu Xueyan, the Xixi National Wetland Park, Huangzhou Botanical Garden, Huangzhou Zoo and Qiandao Lake.