I can see portions of a few walls that are out in spots that used to have a road over 100 years ago but now are reclaimed by the forest. Some of areas are densely overgrown now. Nice work.
I see both surprsing accuracy, and the occasional baffling "I wonder what looked dense there??" errors.
So as usual, LIDAR returns non-intuitive results sometimes, and is ideally refined by ground research, when the budget allows.
But I'll definitely check out the apparent errors in more detail next time I'm there. :)