Haunted forest of Romania and in that forest: a circle where nothing grows. Anything from strange UFO sightings in there to a little girl went missing for 5 years and reappeared, when questioned, she couldn't remember anything between the time she disappeared to the time she reappeared. Even creepier is the circle. A perfect circle where no plants grow and wildlife doesnt go into either. No explanation as to why things don't grow and very strange myths and legends. Personally, I'm not someone to get wigged out on much, but everytime I think, hear or see pictures of this site, hair on the back on my neck stands up. Every time. I get weird vibes from that site just looking at it
Edit: I'm not an expert on this forest. OP asked for scary places on earth known to man. I watched a documentary on this forest. I gave my opinion what I believe to be pretty creepy at least given the stories and such and the vibes I get when I see things related to the forest. So please stop trying to "discredit" my opinion on what I think is creepy for op. The forest is interesting, and the documentary discussed a lot. Again. I'm not an expert. Have a good day guys.
Edit: I'm not an expert on this forest. OP asked for scary places on earth known to man. I watched a documentary on this forest. I gave my opinion what I believe to be pretty creepy at least given the stories and such and the vibes I get when I see things related to the forest. So please stop trying to "discredit" my opinion on what I think is creepy for op. The forest is interesting, and the documentary discussed a lot. Again. I'm not an expert. Have a good day guys.