This has got to be one of the greatest websites out there. In some ways better than "google" since it is a source of public domain information, text, pictures, sound, video and so on. One this I really like is the "wayback machine" that gives you pretty good access to websites from the past.
Don't you hate it when you go to a website and the info you sought is no longer published? Well archive.org might have a record of the previous site, to a point. If your data is buried deep in the site, it might not be there, but it is pretty remarkable record of the world wide web.