WALDEN'S POND?
Could be but it's Wehrman Pond at Red Creek, Southampton, NY.
Check at google map .... https://www.google.com/maps/@40.9080696,-72.5513896,410m/data=!3m1!1e3
Check at google map .... https://www.google.com/maps/@40.9080696,-72.5513896,410m/data=!3m1!1e3
Beautiful naturally a natural environment
Undisturbed area for sure.
The Red Creek Pond is huge and has access to the sea ...Wehrman Pond looks like a newborn little brother.
Great picture @cjao20 Thanks for adding.:-)
It's beautiful and peaceful. It's just for walks.
It is a private pond no trespassing near it.