Trails of Wind maps airport runways from around the world, colour-coding them by orientation. The result is a beautiful map that highlights the intricate patterns created by the runways as each is orientated to maximise the use of prevailing winds.

Also worth checking out is the recent making of article.

Trails of Wind - The architecture of airport runways
Air travel has been in existence for over one hundred years. Since its inception, thousands of airports runways have been built – each one of them designed site specifically, and according to landscape and natural conditions.