The image above comes from Trey Ratcliff and his amazing Stuck in Customs photostream on Flickr.
Whether for classroom use to inspire thoughts and reactions from your students or just for your own reflective purposes, I can really recommend this photostream as a place to go for particularly interesting and captivating images.
Almost all of the stuff I've seen in that photostream is available for use under a Creative Commons licence, too.
And while you're over at Flickr, don't forget the awesomely amazing ELT Pics collection. The images there are contributed by actual English teachers under a Creative Commons licence and there are now more than 5,000 pics there!
:-)
