Yanqi Lake sits just ten minutes north of downtown Huairou, on the edge of the Great Wall at the foot of Yanshan Mountain.A 13-kilometer paved path now circles the shore, so families can cycle or stroll from one quiet bay to the next, pausing at small beaches, fountains and ice-cream kiosks. Electric ferries, paddle-boards, bumper boats and water bikes are rented by the hour, giving easy, safe fun for all ages.