Every death on the road in Great Britain
As part of their series on road accidents, BBC News mapped every recorded death on the road in Great Britain, from 1999 to 2010. That's 2,396,750 road crashes. As you'd expect, the map looks a lot like population density, but check out the videos, which show twelve years of data compressed as if it were one week, played out over a few minutes. Each light represents an accident.
Contrast with road fatalities in the United States.
Update: The BBC headline and copy seem to conflict, but this seems to be just accidents, and I'm not sure when casualties enter the equation. At 2.4 million crashes over 12 years, that's about 455 per day.