Floating Tree in Shirogane Subdivision

Area and coordinates: Shirogane Subdivision (it is not present in main division) Anywhere on the beach between plot 51 and 52, or on the rocks you can swim out to in the water. Screenshot is taken at Shirogane Subdivision 11.8, 6.4
Housing: Shiro Subdivision ward
Steps:
1. Go to Shirogane subdivision
2. Go to the beach or rocks in the water by plot 51/52/53
3. Look up to the cliff, you will see a floating tree

In my screenshot, it is above and to the right of my Hrothgar's head.
https://i.imgur.com/ypTXRJC.jpg