Swamp monster Credit: Alan Moore What am I looking at? This is inside Penrhyn Castle in Wales. The windows in the dome look like the eyes of a swamp monster, in a classic case of pareidolia. More optical illusions:Giant Party in the SkylineA Festival for AntsFloating either wayAmish Men using a TruckDock to the skyBeach YetiPerfectly PolishedGrid Illusion Shirt