rainwater drainage system on gjirokaster castle roof, albania

gjirokaster gjirokastra castle albania ruins architecture building ancient old historic historical heritage rainwater roof management chute method water rain drain drainage system gutter channel scupper exit conduit gully groove trough parapet traditional europe travel tourism landmark unesco world site fortified fort citadel fortification fortress walls walled stone east south ottoman hill hilltop archaeological archaeology stronghold albanian european balkans southern eastern exterior drino valley outside outdoors defensive defence june summer destination attraction sunny sunshine nineteenth century 19th windows