I'd recommend the Eden Project, we went last year not long after the Egg was installed and we've got the cards that allow us to go back for free (or some reduced rate). The allotment bit is kinda cool.

Someone recommended the Lost Gardens of Heligan to me, but we ran out of time last time we were down that way.

__________________
A simple dude trying to grow veg.

http://haywayne.blogspot.com/ - Tuscany update - 27th September

http://tickers.baby-gaga.com/p/dev036pr___.png