I love the following maps, created by Ben Blatt on Slate Magazine. He obtained the data from the Census Bureau's American Community Survey website. The first map is no surprise, as it shows that Spanish is the second most commonly spoken language in the U.S. today (actually in some states it's French or German). It is interesting, though, to see what happens when you remove Spanish and English from the database. What about Native American languages, or Scandinavian languages? I was surprised that Swedish was dominant, though I am still confused about whether Norwegian, Swedish, and Danish are the same language. Ben Blatt has more maps in the original article.