Meldon Pool is not a naturally formed body of water it is a flooded disused limestone quarry, the limestone being used for building and for burning in the nearby limekilns. The water is known to be over 130ft (39.5m) deep ,to give scale of this, nearby meldon dam is 44m high. Mega Deep, I wonder what lies on the bottom. Free parking can be found nearby at meldon resovire, or at meldon quarry.