Heads up: some links here are affiliate links. Book or buy through them and we may earn a small commission at no extra cost to you. We only point you to things we would actually use. Fortifications on the Caribbean Side of Panama: Portobelo-San Lorenzo is UNESCO World Heritage site reference #135, inscribed in 1980 under criteria (i) and (iv), and it’s been on the World Heritage in Danger list since 27 June 2012, decay and urban encroachment are ongoing threats, not a historical footnote.