Google engineer Nelson Minar just finished a personal project he worked on “for a few weeks” — mapping every river in the lower 48. If you want to get geeky about it, definitely check out his post about the project.

For us normal, not-so-smart folks, a few sample pics might suffice…

United States of Rivers - 01

United States of Rivers - 02

United States of Rivers - 03

And here’s the huge, zoomable version.

(via Kottke)