This African tribe is enjoying the day, probably relaxing and singing, connecting themselves with nature. What we don’t see at first, is that they arranged themselves in certain position that makes them all part of unifying optical illusion. Can you see what’s hidden beneath the surface? Try rotating the picture 90 degrees. See it now? I believe you do. You probably don’t remember, but this tribe has long history connected to illusions. They already appeared in hidden object category, with their “Missing Zebra” illusion. Check it out inside this article, it’s posted again as 2nd picture! Also there were hundreds of similar illusions posted on this site in the past. Check “Rabbit Duck” illusion, as well as “Frog or a Horse” one.