The site you are thinking of is the Wayback Machine, online at
http://www.archive.org/ On the top page, enter a URL of interest into
the search box and click the "Take Me Back" button to see all of the
versions of the site available. Depending on the site, some archives
go back as far as the year 1996.
Please note that some sites cannot be archived, due to various coding
issues with the site, or if the site owner has contacted the people at
the Wayback Machine and requested that their content be removed. The
Wayback Machine is only a content archiver, so CGI programs and other
dynamic content sites may not be archived correctly. Image archiving
is also spotty, so you may end up with a bunch of broken images on the
Keeping that in mind, the Wayback Machine is a fascinating time
capsule that allows us to view the Internet in its early glory days.
Some links down memory lane to check out include:
And some search engine named after a very large number: