Memorial to the US submarine crews who died during WW2. I've recently read 'Clear the Bridge!' by the commander of the USS Tang which was sunk by a malfunctioning torpedo, so it was particularly poignant for me:
Memorial to those who died in the encounter between the German Auxiliary Cruiser Kormoran and HMAS Sydney. The wrecks of these ships were found in 2008:
Propeller from the heavy cruiser Prinz Eugen and a model of the ship:
Salvaged bell from the Admiral Hipper: