Have fun with onsite activities like mountain biking and hiking, and practice your swing on the tennis courts. Additional recreation onsite includes fitness classes, basketball, and ecotours. Enjoy treatments at the spa and relax in the indoor and outdoor pools. Doubletree Resort By Hilton Hainan - Xinglong Lakeside also has hot springs, a 24-hour health club, and private indoor hot tubs, as well as an arcade, a picnic area, and a garden.