"Every picture tells a story" - at least, that's according to that great philosopher of our time, Rod Stewart. But what about the stories behind the pictures themselves? At ArchDaily we know that a great image requires not only great architecture but also a skilled photographer, so to celebrate World Photo Day we decided to find out more about the most popular images on ArchDaily. We've taken the ten most bookmarked images in My ArchDaily, and contacted some of the photographers to find out more about their images - read on to see the top ten, and to find out the stories behind six of them.