About the history and wrecks of Scapa Flow.
http://www.scapaflowwrecks.com/
Scapa Flow in the Orkney Islands, off the north-east coast of Scotland became the base of the Royal Navy's Home Fleet around the turn of the twentieth century when it became evident that the Kaiser's Germany was becoming the major threat to Great Britain and peace in Europe rather than France who'd played this role for most of the last millenium.
It was also where the German High Seas fleet was interned at the armistice in 1918. The following summer the officers of this fleet decided to scuttle their ships without warning and some seventy vessels - nearly the entire fleet! - sank into the shallow waters of the anchorage.
Most remarkably, in the early 'twenties a scrap metal merchant - Cox and Danks I think - bought the entire fleet on the seabed and proceeded to raise most of the capital ships during the following decade and have them towed to Rosythe dock yard where they were broken up for their enormous high-grade steel content.
Well worth an explore.