I have done this at multiple institutions, and it has been a relatively easy and fun way to engage students, staff, and faculty into International Education Week. I usually pick a theme for the photo contest ("celebrating the international", "the world through the senses", etc.). You can have a submission due date before international education week, have a group of judges pick the winners, then announce the winners during IEW. I have been able to get local art supply stores or framing stores/galleries sponsor the photo contest and frame the winning photos, making this a low-cost event!
Idea No. 67