I think the only sensible comment recently has come from Paul Luckman, the editor of The Portugal News in Lagos, Portugal, who mentioned the 600 plus wells dotted all around the Luz area. The scope of such a search is nigh impossible and anyone secreting a body there would know that. A terrible realisation for the parents of any missing child.
As a matter of interest, how many wells are there on your farm?
I would expect, given the time, effort and cost of digging and maintaining wells that the norm would be one per farm. Perhaps two, if the humans used one well while the other was used for animals and crops.
If it is one well per farm, Luckman's guesstimate requires 300 to 600 farms around Luz. Of course, if you make the 'area' 'around' Luz big enough, you will indeed get 300 - 600 farms.
I have no idea how big that would be in 2007 terms.
It is therefore, IMO, an untestable opinion, hence uncontestable. Personally, I am filing it in the same folder as rape whistles for nannies - 10th anniversary froth.