These URLs:
google.com//////
google.com/intl/en//////
google.com/intl/en/intl/en/
...will take you to an old Google homepage (copyright 2003).
And this URL:
google.com/intl///////
...will take you to an even older homepage (copyright 2001).
The page from 2003 doesn't have any link to other Google services like Image Search or Groups, so it's not the actual Google homepage from that time. The page from 2001 is Google's homepage.
Update: Google fixed this and no link seems to work anymore.
