Tree, Hatfield Forest

Randomly stopped next to this tree because it looked interesting. One unusual thing was that I noticed it had 2 rusty 6 inch nails hammered into the bendy trunk on the right. It's a bit off the beaten path so I did wonder why they were there. Also what are the chances of choosing a tree to take a photo of in the whole forest and it having 2 nails hammered into it?

Done