昌平区, 离北京47公里. 走八达岭高速到刘欢, 往东走到白善乔, 走 S321Part of A Better Guide to Běijīng’s coverage of Běijīng Suburbs and Beyond
延庆县, 离德胜门102公里. 走八达岭高速, S102 到延庆, G110 到松山Part of A Better Guide to Běijīng’s coverage of Běijīng Suburbs and Beyond
Chinese sources are spectacularly vague on the history of the caves, but are for once at least…