Introduction to Big and Small Tianhu: are two alpine lakes on Dayu Mountain Island. They are located on the top of Tianhu Mountain, more than 20 kilometers away from Mazu Village in Dayu Mountain. One large and one small, respectively named Da Tianhu and Xiao Tianhu. The mountain is about 500 meters high. The Datian Lake covers an area of nearly 1,000 acres, where you can enjoy boating; the Xiaotian Lake covers an area of more than 200 acres. The two lakes are more than 1,000 meters apart, and each has its own spring, which is inexhaustible all year round. The water is sweet and as clear as a mirror. It shines due to the sun and wrinkles due to the wind. White gulls gather from time to time, and there are many wild turtles near the lake.