Most popular fortresses PortugalPorto District Fortresses Porto district Fortresses Porto District mapSee on the map Porto district fortresses by popularity rating +PORTOPortugalFort of São Francisco Xavier+PORTOPortugalFort of Saint John the Baptist See fortresses in other regions Porto District Viana do Castelo District Other categories:MuseumsChurchesGardensBeachesLookoutsPublic squaresFunicularsBridgesParks