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