As and when my parents kick the bucket, assuming that they still haven't got their arses in gear and made a will. Then I'd get a chunk of the place in Tuscany, either 1/2 or 1/3, then there is the place in Kent and the flat in London (currently rented out), so I guess 1/2 of those as well then if they've both croaked.
Personally though I'd rather they stuck around, going to visit them is so much easier if they're around to keep an eye on the kids, fix me a sandwich, etc... And despite all their many, many faults, they are still my parents and I'd rather they were here than not. In fact with the kids, I'd rather they lived in London than as far away as they do, as I'd be able to get them to pick them up from school etc... Hmm, maybe we should move to Kent?....
As an aside, both of my wife's parents died before I met her, and especially now that we have kids of our own their absence is very keenly felt...