While we were there we took a tour of the grounds. Check out this tree, it is a Weeping Beech. This is just one tree, my father is standing in front of it to give an idea of how big it really is. The following pictures are taking from "inside" the tree. They built a small deck aroung the base of it so the roots don't get damaged from people walking on it.
And finally, these are the Osprey that live at the Arboretum. The nests are waaaaay up high.