A Puzzle on the House: People of Lvov city in Ukraine decided to add another attraction for the visitors of their city. According to the artistic project it was decided to place a giant 100 feet (30 meters) tall at the wall of the one of the multi-stored residential houses.
There is one interesting detail about the design of the puzzle. It looks like an empty puzzle during the day-light, but at night when special lights are on the words in the puzzle become visible with a lightly-glowing fluorescent color.
