Summer draws to an end and Labor Day comes soon. Have you planned something already for this three-day weekend? If you are thinking of going on a short vacation you can relax on a beach, go on an adventure vacation, like mountain climbing or you can use these few days to go sightseeing in some of the biggest cities of the U.S. We decided to choose the last one, so just take a look at these big city vacations hand-picked specially for you!