This site has been around for a while but it is still the coolest way to search for images (in my opinion). The way it works is that a user would search for an image and Galaxy Tag website will connect to Flicker and pull in the relevant images linked to the search criteria. It has some smooth transitions that display the results as planets. The center planet is what you searched for and it also displays linked search criteria in additional planets. This allows you to narrow your search criteria by clicking on a corresponding planet. Your final results are displayed on a planet where you rotate and click on the picture you want to display it.
I have used this with my students and they love to use it to get pictures for their work. So there you go a fun way to search for images online. so have a look at the site and let me know what you think. http://taggalaxy.de/