I have it on the grapevine a new discovery in the limestone open cast mine, in the face a large opening with a big pitch to a massive chamber i don't if you can get permission but it could be big ,a work mate as seen it but the manager will not let anyone go down on safety regulations its an opening in the face a rock roles down about 10 meters and a 4 second drop and a big splash ,just a heads up for you guys ,and no this is not an April fools day wind up, good hunting .