Shuanglong Gorge must be praised, strongly recommended! Shuanglongxia Scenic Spot is next to Mentougou 109 National Highway. There is a section of mountain road from the Fifth Ring Road. However, the scenery is really good. The ticket + round trip train needs 50 yuan. It's not expensive. Children under one meter and two do not need tickets, but the round trip train needs tickets. The small train is not far from the entrance, half an hour, one kilometer journey, a little short. The strange rocks in the scenic spot are small. Streams, waterfalls, suspension bridges, small lakes, forests are all available, the mountain road is very gentle, while I walk and do not feel tired, we took our children only to the first waterfall and came back half did not walk, unfortunately, the next time we have to walk.