Erhai Lake, known as Yeyu Lake in ancient times, is situated to the east of Dali. A plateau lake, it is 42 kilometers long and 3.5-7.5 kilometers wide. It is 150 kilometers in circumference and covers an area of 252 square kilometers. The deepest spot is 21 meters. In spring, the water twinkles in the sunlight. In summer, the lake is surrounded by green-trees, the branches of which stretch over the water. In autumn, the lake is tranquil and charming. In winter, the twinkling water and the snow-covered Cangshan Mountains form a charming contrast. In this scenic area, there are three islets, four islands, five lakes, nine streams, eight special views and four pavilions.