Most popular fortifications PortugalViana do Castelo District Fortifications Viana do castelo district Fortifications Viana do Castelo District mapSee on the map Viana do castelo district fortifications by popularity rating +VALENÇAPortugalValenca Fortress+VIANA DO CASTELOPortugalFort Santiago da Barra+VIANA DO CASTELOPortugalFortress of Areosa See fortifications in other regions Porto District Viana do Castelo District Other categories:BeachesMuseumsChurchesFortressesSanctuariesCastles