its not a pit, if you look closely the shadow is on the right side, same as the shadow on the trees, that makes this a raised pyramid structure. Also its not a mine, I know the land that this thing is on, its an old chemical dump site. While it is easy to tell from the sat photo that this is a raised structure with a pyramid shape, i have no idea how high it is. I have drove past it numerous times on the nearest road to it and I have never seen it, but the area is heavily forested.
I just thought it was kinda weird what can be right in your back yard and you don’t even know it… till you see the satellite photos