Blue lagoon or disused cement works?

Amazing what you find on your doorstep! Decided to try out a new route today on our walk and came across the disused quarry that used to be the cement works. One of the James Bond films had some scenes shot here. The water was a beautiful blue colour but the sides were very steep and I wouldn't have fancied mine or the dogs chances if we'd fallen in! You can see how huge and deep it is by the size of the lifebelt on the side. Had a lovely walk tho albeit very windy!