Tintin Tourism
I’m afraid I don’t understand a word on this site, PierreTintin, but it has a lot of non-English Tintin links and resources. Amongst many other things, it hosts a document [ PDF ] looking at Nyon, on the shore of Lake Geneva, and how Herge used it in The Calculus Affair. Again, non-English, but the pictures are worth a look. You can also check out the locations on used in The Calculus Affair and all the Tintin books using the Tintin Map.



