While some may call a clear, blue sky art enough, French artist Thomas Lamadieu might say otherwise. In fact, he might call it a blank canvas. His ongoing series, Skyart, takes the blank spaces between buildings and turns them into illustrated wonderlands filled with bearded inhabitants and imaginary animals.

His illustrations started out as line drawings lacking any intense detail (see below) and have grown more cartoonish with his recent pieces. It would (almost) be easy to mistake some of his earlier work for messes of telephone lines or flocks of birds in abnormal formations.

With architectural photos making up the background, Lamadieu's work makes fun plays at the surrounding structures. He makes the most of the haphazard spaces, thanks to a few imaginative props. Check out a full archive of the project (and more from Lamadieu) here.

Via PSFK