Highlights: Yangtianshan National Forest Park is situated in Qingzhou City and is a bright pearl in Luzhong Mountain. The quiet and wild nature is recognized as the "natural forest park". The majority attractions on the mountain are Yangtian trough, Foguang Cliff and multiple caves. Yangtian trough is a rare limestone eroded depression in the world. Foguang Cliff is a global-famous large echo wall.