Most of the area`s are surrounded by ditches. The entrance is a dam . If it is farmland there normaly are n`t any gates. In this case you can see from the barbed wire is`s protected nature area . The signs also tell you. (can you find one?)
The same scene from another pov Ferry , I had wondere about the gates - now I understand . I think I can notice a sign along th ditch to the left-hand side !