Artist Henk Hofstra painted a 10x1000metre stretch of road blue with the words WATER IS LIFE written in 8m high text.
Its located in Drachten, Netherlands on a road called the Moleneind.
Unfortunately it doesnt seem to be on google earth yet. But heres a link to the kml file just in case that changes!
Take a look at the artists site or his gallery profile on the panoramio site