There are some things in nature and in the wider world that are disturbing. Humankind has definitely produced plenty of ideas and goods that have creeped out many. However, one element that is not usually thought of in this context is arboreal life. So now we're going to pick out some of the highlights (or if you prefer, the lowlights) from the world's creepiest trees. Not for the faint of heart or aboraphobes: