Me and a couple of friends went out onto the moors. In the middle of nowhere we find this building and intrigued by it we go for a closer look! Inside there's a drop of about 6 foot onto a metal grid. On closer inspection there's actually (which didn't come out well in the pics) a giant hole in the ground. We've no idea how deep it is, we dropped small rocks down the holes and it took a fair while for them to hit anything. We all stepped back in amazement when you finally heard the faint impact. It's very deep. The huge 12' wide hole turned into a pin point dot at the bottom. Anyways. We spotted these. I think they're flares, but a friend said it might be dynamite (caving?) which I doubt. but hey. It's a friggin hole to the centre of the earth. Any guesses? I'm tempted to go back with my actual camera but I can imagine the whole thing vanished with a trace. It's a little bit eerie.