The New York Times has put together a set of maps with American Community Survey Data, one of which shows race & ethnicity. One reason maps like these are so powerful is because they allow us to put together a story on different scales.
They also prompt powerful questions. What does the map look like when you zoom in to your address? How does that change for your census tract and when you zoom to look at the county as a whole? What was expected and unexpected about the map?