Do you like puzzles? Even in the pre-internet era, optical illusions were very popular. You know, pictures with a full-fledged landscape, a portrait or a simple still life, but if you look at them from a certain angle, it miraculously turns into something different. For example, the branches of trees take the shape of faces, the waves of a raging ocean turn into silhouettes, and sometimes it happens that the beautiful girl on a portrait gets old and becomes a disheveled old lady with a huge nose right in front of your eyes