What is the name of the site that shows you all locations of a photo?

There was this site that I went to before that showed you all of the locations of a photo. You would give the link of a photo or upload it onto the website and it will search for all the places on the whole internet that the photo was uploaded and it would show you the results. This was very helpful since it could help find out if someone was impersonating someone else or lying about something. I don't really remember but I think the website's name had "steel" in the name. Thanks in advance.