Paris: The wreck of a World War One German submarine is gradually resurfacing on a beach in northern French after decades of being buried in the sand. The UC-61 was stranded there in July 1917. The crew flooded the vessel and abandoned it and by the 1930s the submarine had largely been buried. It is now becoming a tourist attraction again. German submarines, known as U-boats, targeted Allied shipping during World War One, sinking hundreds of vessels. Historians say the UC-61 was credited with sinking at least 11 ships, either by laying mines or by firing torpedoes. On its last journey, the submarine had left Zeebrugge in Belgium and was heading to Boulogne-sur-Mer and Le Havre to lay mines when it ran aground. The 26 crewmen surrendered to French authorities.