When Christopher Columbus set sail from Spain in 1492, we're guessing he had at his disposal a couple of maps, a compass or two, a handheld telescope, and probably some books to keep him entertained. But what would he bring with him if he made that same journey today? Ignoring the fact that he would simply board a plane and fly, we think he would load up his iPhone with a bunch of apps to make his voyage easier. So, in celebration of Columbus Day, we put a modern-day twist on his infamous expedition to present the 10 iPhone Apps Columbus Would Use Today. Bon voyage!