Cool stuff, it is amazing how stuff can survive depending on the elements.

Check out the video of the russian WW2 tank being pulled out of the mud after 65 years and they got it running shortly after. Being incased in mud kept it in great shape. The nazi's had captured it but then sunk it in the mud when retreating.

Also, check out the Bugatti in the lake in france. Didn't do as well but a very cool story.