Sorry but I forget...are you from there or just close enough to go a lot? Anyway your statement about the cows reminded me and made me wonder...do you think it is true what I've read and heard from the Rangers and Guides that it was animals that kept all the underbrush in check? I'm sure they wandered through woods at times but really enough to keep stuff from growing? If you know or have a theory.
I don't know the area well enough to guess but I'll bet the building in the back should give it away.