American English Dialects
►http://aschmann.net/AmEng/#LargeMap2Left
▻http://aschmann.net/AmEng/index_collection/AmericanEnglishDialects.gif
For many of the cities or towns on this map, you can listen to an audio or video sample of speech of a native (more specifically, someone who was raised there, though not necessarily born there, and whose dialect clearly represents that place). All of the cities or towns with a green center have such an audio or video sample that can be listened to (and a few of the ones with pink centers do also).