The Sketchbook Project collects sketchbooks from around the world, then takes them on tour around the world. Pretty awesome.
Most of the pages in my sketchbooks are far from finished works of art. But the beauty of this project is that sketchbooks can be anything. Some of the examples in this video by MailChimp take the idea of sketchbooks to a whole new level.
The project is run by The Brooklyn Art Library and is open to anyone and everyone who wants to participate.