This map has been making the rounds for a while, but if you haven’t seen it yet, it’s worth a look.
American English Dialects1. Click on the map to enlarge it, selecting either the U. S. or Canada. 2. Click again to zoom in more. 3. Click on a state or province to listen to audio or video samples for each location. (Full instructions) 1 Western dialects: 7. North Central 8.
via Aschmann