Check out America’s racial makeup in technicolor.
On the Weldon Cooper Centre for Public Service's website, you can manipulate the map by zooming in and out. The map above represents the big picture, but only if you zoom in to particular cities (or even neighborhoods) do you really get a sense of both the racial diversity and segregation in the United States.
Here's New York City (all maps use the same color key as the map above):
Boston:
demographics.coopercenter.org / Via Emily Badger for The Atlantic