It’s the little things… like thumbnails!
A while ago I wrote about this topic, adding thumbnails to your listings in search results, not sure if anyone made any updates based on it, but I finally swallowed some of my own medicine and tried it out on maps.unimelb.
Each page now has a reference to a thumbnail meta tag, which is retrieved as a static image from the same source (open.mapquest) as our current tile background. The thumbnail uses the latitude and longitude coordinates to display a tiny map of the location.
Try it out with this query: http://search.unimelb.edu.au/?q=site:maps.unimelb.edu.au%20theatre.