Tien Sa Lake tourist area is located at the foot of Tan Mountain, in Tan Linh commune, Ba Vi district, Hanoi. The lake is located at an altitude of 65 ~ 400m, with a total area of ​​about 150 hectares including a forest of about 120 hectares and Tien Sa Lake with clear water all year round of 20 hectares. Surrounded by Ba Vi Mountain with green forests, in the middle is a lake, so the climate here is pleasant all year round, the air is fresh.