From a tourism standpoint, I think it would be better not to copyright a landscape (I'd heard about the tree in Carmel, and thought that was outrageous, but all of Tuscany?). After all, distribution of lovely photos encourages people to visit such places, so limitations on photos seem to be counter productive for the tourist industry. If places like, say, Bermuda, are willing to pay to have landscape photos placed in magazines etc, to advertise their locale, it seems to me that discouraging taking and distribution is turning down free advertising (I mention Bermuda, of course, because they recently had an ad which included a beach scene actually taken in Hawaii, not Bermuda).
As to rights of the photographer in the US (don't know sites for other countries, it might be worth checking out:http://www.krages.com/phoright.htm
An excellent one page PDF file entitled "The Photographer’s Rights: Your Rights and Remedies When Stopped or Confronted for Photography", by Bert Krages - he also has a book on legal aspects of photography.