Closer to home, here is the notorious German submarine U9 beached in Dover in 1919 and subsequently taken round to the Camber. Under Otto Weddigen this U-boat was responsible for sinking the three elderly cruisers HMS Aboukir, Cressy and Hogue in the space of one hour in 1914. Known as the "Live-Bait" squadron due to their vulnerability they had been sent to patrol in the Broad Fourteens off the coast of Holland. Less than a month later, U9 sank another cruiser, HMS Hawke. Together with the many merchant ships U9 sank during the war, this vessel was responsible for the loss of many thousands of lives.
These photos were kindly sent to me by Maggie and Simon of the Dover War Memorial Project some years ago. Here is their description:
"U9 survived the war and was surrendered to the Royal Navy. On its way from Harwich to Morecambe for breaking, it began taking in water. On 13th March 1919 it came into Dover Harbour and sank. Three weeks later, on a high tide, two lighters succeeded in raising it. As the tide fell, U9 was left high and dry on the sands by Waterloo Crescent. To Dover, the town whence U9 had sent so many men on their last journeys, the submarine, on its own last journey, now returned. Perhaps it was a fitting tribute. Pumping out the remaining water, dockyard employees effected repairs to render U9 once more seaworthy. A fortnight later, the submarine was refloated, and eventually docked at the Camber, by the Eastern Arm of the harbour."
http://www.doverwarmemorialproject.org.uk/Information/TheProject/Articles/GreatOaks.htm