'The Columns' Ogof Ffynnon Ddu cave, South Wales, UKGaewern Slate Mine. North Wales, UKRhosydd Slate QuarryDroitwich Lido, UKRailway tracks and an incline going deeper into the Dinas Rock Silica Mine, South Wales, UKDinas Rock Silica Mine. the beginning of the flooded section. South Wales, UKDinas Rock Silica Mine. Large chamber supported by rock pillars. South Wales, UKSubmerged Series 3 Land Rover at a depth of  22 meters at the Stoney Cove National Diving Center in Leicestershire.Maen Llia Standing Stone