Some amazing maps of the US from Ben Fry:
An image of 26 million individual road segments. No other features (such as outlines or geographic features) have been added to this image, however they emerge as roads avoid mountains, and sparse areas convey low population. This began as an example I created for a student in the fall of 2006, and I just recently got a chance to document it properly.
2006-2011 archives for The Daily Dish, featuring Andrew Sullivan