Web site that searches for photo sources

Someone once posted a web site here, and what said web site did was let you upload a photo and then it would seek out the source(s) of the photo. I once used it to find a non-photoshopped original photo of something.

Does anyone have any idea what I’m talking about and know the web site to which I’m referring? Thanks.

I think this is what you are referring to…
http://tineye.com
And here is one of the threads where it was discussed…

Have to say, TinEye is about the most interesting thing to come along in a very long time. Thanks for mentioning it again; I didn’t catch the first discussion. I’ve installed the plugin for Fx as soon as I watched the vid on what it can do. Amazing!

That is just awesome. I had no idea this existed, thanks!