Singapore forest? I don’t remember any there.
Didn’t you see the five potted plants and trees in the west corner of the VivoCity Mall? He lived there!
I suspect its in the central water catchment / reservoir area. I ran a couple times with the Hash House Harriers group in Singapore. We ran through jungle forests, up and down small ravines, and had to swim across small lakes. And then you step immediately back into city life.