Doumu Palace is located north of Wanxianlou, and used to be called Longquanguan. There is no reference as to when it was first built. It underwent reconstruction in the 21st year of Ming Emperor Jiajing's reign, and got its current name thereafter. It was originally a Taoist establishment managed by Buddist nuns during the first year of Qing Emperor Kangxi's reign. There are dozens of buildings within the palace, divided into Sanjinyuan. There are three Tingquan Shanfang on the east side. Outside Xishanmen, there is an ancient pagoda tree growing along the ground, and is colloquially called Wolong Pagoda Tree.