Have a look at the way Francesco Paciocco credited this short video about Milan. It is a video, but the shots are very close to still images. We do not see the cliché images of the Duomo and other tourist attractions. Instead, a flow of scenes from daily live.
I like cinematic openings in PowerPoint presentations. A series of images to take the audience to a different place. While it might be a bit too complicated for the average designer to create such a video, you can create a very similar effect in PowerPoint by sequencing a series of Flickr images with a Creative Commons license. If you want, you can go one step further and add a slow-zoom effect to your images.