Looks like an abstract watercolor, doesn't it? If you are a geography nerd (like me!) it might look familiar. That's because it's a digital watercolor map of Tokyo! Isn't it fantastic? Click over Stamen to make maps of any place on earth in watercolor, terrain, and toner finishes.
(Thank you to my thoughtful husband for sharing this link (which he saw via Very Short List).
You sure know how to make this nerd happy :)