The Submariners' Memorial in Elder Park in Glasgow. It's principally dedicated to the 32 people who died when the submarine K13 sank during sea trials in the Gare Loch in 1917, including 6 employees from the nearby Fairfield Shipyard where it had been built. Miraculously, 48 of the people who were on board at the time were successfully rescued after some 60 hours trapped at the bottom of the sea.