“Flickr Related Tag Browser lets you surf Flickr’s ‘tag space’. Flickr tags are keywords used to classify images. Each tag has a list of ‘related’ tags, based on clustered usage analysis.
Thanks to the Flickr team for their great API. Flickr is almost certainly the best online photo management and sharing application in the world.”
Basically, When you search for something, you get a stack of images related to that topic, but you are also surrounded by other words that relate to your original query. You can click on each word to get a new stack of photos, and a new set of related terms. It’s very cool, you should give it a try.