Poor weather meant we had to find a dry weather option so Facit stone mines near me was the choice. It was no where near as dodgy as I was led to believe and we had an enjoyable 4 hours of near getting lost in the 20km+ of passages in there. The place even had formations and plenty of things to see. The only real danger was it was a labyrinth so getting completely lost was a possibility, but if you just keep heading the same direction until you can't go anywhere, then follow the "wall", you will eventually find your way out, even if it's a different entrance. Scaife recorded it on Strava, which of course did not work.