There aren't too many ways to achieve this without it looking a little odd to Google. The use of Images is probably the only real world way, but do remember that Google can view images well, and I have always advised anyone wanting to do this, to avoid it.

I haven't tried this myself, but can see it working by using iframes and then Disallowing them in Robots.txt
http://stackoverflow.com/questions/15685205/noindex-tag-for-google

Andy