Some map makers seem to have indulged in this for fun: For Decades, Cartographers Have Been Hiding Covert Illustrations Inside of Switzerland’s Official Maps

Some map makers seem to have indulged in this for fun: For Decades, Cartographers Have Been Hiding Covert Illustrations Inside of Switzerland’s Official Maps https://eyeondesign.aiga.org/for-decades-cartographers-have-been-hiding-covert-illustrations-inside-of-switzerlands-official-maps/ https://eyeondesign.aiga.org/for-decades-cartographers-have-...