All of the streets in the lower 48 United States: 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. The pace of progress is seen in the midwest where suburban areas are punctuated by square blocks of area that are still farm land.

Also of note to World Almanac fans: Fry's zipdecode, an interactive map of ZIP codes in the U.S., which does a fantastic job of, yes, decoding the numbering scheme for postal codes. Click on the image, type "Z," and then start tapping in your favorite ZIP codes.

More at benfry.com