The Web Archive
Unbelievably there is website which archives the web. This can be used for nostalgic purposes to see earlier naff versions of your website.

More usefully you can perhaps "recover" lost websites, which have been accidentally deleted.

http://www.archive.org/

See an OLD BBC from 1997

http://web.archive.org/web/19971009000320/http://www.bbc.co.uk/