Bob, I see. you went to the 桃源仙谷 ice park. One has to pay to climb there. At least part of the ice is man-made. Other places in the same region include the Yunmeng Gorge, where there is a large fall (maybe 60m). You need to walk for at least about an hour, and has to pay entrance fee though. In 天仙瀑 (Tian Xian Waterfall) gorge there are several natural waterfalls 80m high, from WI3 to some steep hairy unbolted mixed horror show if you dare. You need to drive off-road for 30min and walk for about 45min. It;s free to enter the gorge but make sure not get caught by the fire guards.
Usually when climbing in this region climbers stay in Delai's guest house which has been a climber's favorite meeting place for the last 10 years. Delai could pick you up from Miyun town center in his mini van and send you to the climbing places. Since there is frquent bus connection between Miyun town center and Beijing, one doesn't even need own transportation to climb there.
Look for Beijing climbing partners at
plenty of english speaking local climbers there.