GeoGraph - photograph every grid square

This flooded slate quarry has become a popular venue for recreational activities among the ruins and remains of the industrial past. It is also a protected marine environment where many organisms thrive in the shelter of the enclosing walls. The turret on the end of Trwyncastell (Nosecastle)is an old lookout point or watchtower (Y Twr Gwylio) possibly used to guide ships or maybe for recreational use by the quarry managers!