This billboard is fantastic. It only works for a portion of the day, but when it works it really, really works. At McDonald’s, you can only get breakfast until 11. Not sure of what to get? Use this handy sun-dial to help you out. There is an aluminum replica of the McDonald’s arches perpendicular to the rest of the billboard that casts a shadow on the different breakfast food items you can get. Advertising agency Leo Burnett commissioned this billboard and even worked with an engineer to find the best possible location in Chicago to put it up. It’s so clever that (dare I say it), I’m lovin’ it.