This is another site in Hans sur Lesss - http://www.valdelesse.be/start.asp?rub=4&srub=7&id=92 - but it has 94 pitches and is bigger than Le Pirot, which has only 18 pitches. All the sites in the Valley of the Lesse are listed on the above website.
Hope this helps (haven't actually been - but my long-ago ancestors are from the Ardennes, and I'd like to spend a bit more time there!