Eye of a tree Source/credit:hasmodia What am I looking at? The is a natural formation on a tree trunk that remarkably resembles an eye, a phenomenon known as pareidolia. The “eye” is formed by a knot or hollow in the tree, with the surrounding moss and bark creating the illusion of an eyelid and iris. More optical illusions:Underwater WaterfallCat defies gravityA couple of cars in a parking lotLEGO brick floorCross-stitch CatsTokyo ViewAbsolutely impossibleFootprint in the sand