This is on top of a small hill garden giving a bird eye view of the forbdien palace city. The location at the exit gate of the city where coaches, vans, taxi and private cars waitng for tourists for pick up etc.
If you join a package tours by the time you are outside and notice this hill graden it is too late for you to visit and it is FOC.
This was the place where Zhu Yuan Chang emperor hang himself on tree whenhe know that the rebel army going to over run his army defending the Palace city. A new tree is planted to replace the former tree that was gone hundred over years.
I visited by chance when I need to go outside earlier to meet a close friend and she took me there when I asked about it.