I remember a similar case on Malta, where I went up a hill to get a nice view from a cave, recommended to me as part of the tourist route. The whole access to the cave lies across private property and there's about 20 signs explicitly pointing where to go and what will happen if you go anywhere else. I got to the cave, enjoyed it, got out, never once stepped outside the designated route. I imagine the owner worked out that meticulous path a while ago to minimise tourist noise.