Some days ago, i was "middleearthing" with a friend and he told me he usually, when he does not have the site, uses his mobile phone to google for the needed site image, full sizes it and place it over the table as if it were the real card.
The problem with this is that not all sites are easily found in a quick google search.
That made me think and as a result, I came up with the idea of writing an online interactive map.
The idea is that once you select the map you need (heroes, minion..underground) you can hover the map regions (color coded based on region type) and click over the desired region.
A new web will come up with all the sites inside that region.
Well, have a look and see if you find it useful:
http://meccgmap.esy.es/MapaWeb/MapaWeb.html
Work is still ongoing, so if you come up with any ideas please share!
Hope you like it!

PS: Site basic information is on the main map under the site name. Just zoom to check it out.