EXCELLENT IDEA: North Africa's oldest synagogue to become a world heritage site? Tunisia seeks UNESCO World Heritage status for Djerba Island, "isle of kohanim" and site of 2,500 years old Ghriba synagogue (AFP via Arutz Sheva). I haven't been able to find out exactly how old this synagogue site is, but it does seem to be old.
As as aside, it looks as though the Lag B'Omer celebrations in Djerba went safely, despite the recent terrorism alert. That is good news.
Background on the Ghriba Synagogue on the island of Djerba in Tunisia is here and links.