The Ukrainian city of Lvov installed a super-size crossword. The puzzle covers the entire side of a residential tower block that’s approximately 30 meters tall. During the day the crossword appears empty - with the answers lighting up at night. The questions for the puzzle are located in different point of interests of the city: monuments, theatres, fountains etc. so people walking around the city can try to solve the puzzle and write down their answers. All for no other reason than to give poeple something interesting to do!