Can't get back to all the comments, thanks all <3
EDIT: I used HILLS and not MOUNTAINS on purpose lol, c'mon guys I'm not that clueless. Tunnels absolutely do not figure into my question. Thank you everyone for answering this has been enlightening.
EDIT 2: I don't think it has occurred to some browsers of this sub that the people asking these questions have probably considered their own question and come up with hypotheses already. Trust me, I had 2 hours longer to drive and think after I posted the question at a gas station haha. ELI5 has confirmed some of my hypotheses about this and also added many new pieces of information to the puzzle which I am grateful for. Some of you taking time out of your day to say "stupid question" or something along those lines, please don't consider becoming teachers, and go forth in this sub operating under the assumption that a lot of the questions asked here are not just asked out of curiosity, but also just seeking confirmation of hypotheses before going out into the world and spewing BS lol.
How about you.
I live on the outskirts of a big town/small city making me one of the few people with a big yard. I live on top of a little hill and my yard is really big and runs all the way to a small wooded area and then the field next to it is also mine it pretty much cuts my neighbors yard off(Think like an upside down L shaped yard)
One of the major draws of the area I live in is it's lovely view it was also a big part of why I chose to live here. Most of my neighbors have no fences.
Before Corona I was only really home in the evening and weekends corona has forced me to work at home pretty much all the time(I only have to come to the office once a week at most) as a result I have started making a lot more use of well...My house lol, this includes the yard.
I got a backporch and I have noticed that I love sitting outside with my work laptop and a cup of coffee so that is what I have been doing. The problem is, because I was not home much I barely do any gardening aside from cutting the grass which means my yard especially the portion at the back with the turn is a perfect soccer field for the neighborhood kids, especially my neighbors kids are using it pretty much all the time, I even caught them dragging a goalpost into it. I went to talk to the neighbors as I am not happy with random people using my yard and even less happy about notbeing able to work because of a horde of screaming kids in my yard, even if it isn't fenced but I was met with the whole "Kids will be kids, They don't have anything else to do for fun right now, don't worry, you are not using it anyways." I told them I did not want them using it regardless, but as you can guess by me writing this post the kids kept using it.
So I put up a big wooden fence(The preassembled ones where you just gotta put in the posts and drill in the big wooden panels) it was quite a lot of work while only being able to ask 2 friends for help but after a few days I was done. My neighbors kept coming out to complain, begging me to remove it etc claiming they now didn't even have a view.
I figured they were overreacting but now that I am done their yard is literally tiny and their view went from a beatiful hilly landscape with woods, to the top of a wooden screen meanwhile my view is still the same. Their kids have since come over to ask to play in my yard as have a ton of other neighborhood kids as have their parents who were angry their kids now have nowhere safe to play and I am starting to feel shitty.