Something that could be climbed up, or a tree-house built in, or a place to scratch your initials along with those of a loved one enclosed within a heart, are all probably memories now with a sense of nostalgia attached to them. Nowadays, we're more likely not to really notice trees whilst we're walking past them on the street or driving by them on the road. And yet, there they stand, like silent sentinels, guarding the very ground we walk upon.