There were several threads about rediscovered WW2 vehicles/aircrafts/ordnance in the past. These may be summed up in this one from now on. As a start:
Soviet self-propelled gun SU-76 fished out of river Danube
After more than 60 years a Soviet self-propelled gun SU-76 was discovered at the bottom of river Danube near the town of Hainburg/Austria.
Because the vehicle couldn’t get pulled out from the banks a ship’s crane had to do the job.
Some fifty 76.2mm shells and several handgrenades were still in the vehicle and had to be disarmed by the explosive ordnance disposal unit of the Austrian Ministry of the Interior.
For now the SU-76 will be stored to the military museum (Heeresgeschichtliches Museum) at Vienna where it is supposed to get examined by experts. It isn’t clear yet what will happen to the SPG after the examination.
http://noe.orf.at/stories/370051/
June 2009