Scapa Flow (Orkney)

Sunken WW1 German Naval Ships and Block Ships, now the haunt of divers. It was thought that these wrecks would seal off the anchorage but a U-Boat managed to get through in 1939 and torpedoed the British navy which was anchored there. HMS Royal Oak was sunk and is now a designated War Grave so diving is prohibited on the wreck.

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