Forte da Ínsua
Moledo e Cristelo, Portugal
The Fort Nossa Senhora da Ínsua, also known as Ínsua Fort, is located on Ínsua de Santo Isidro, in the parish of União das Freguesias de Moledo e Cristelo, in the municipality of Caminha, in the Viana do Castelo district, in Portugal. It has been listed as a National Monument since 1910. It is one of only two forts in Portugal that combine a monastery with a modern bastion fortress, the other being the Berlengas Fort.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).