porta de beja entrance portal in the serpa castle wall with two cylindrical turrets, alentejo portugal

building fortification castle wall landmark tower rock temple tourism history architecture porta beja entrance portal serpa two cylindrical turrets alentejo portugal aqueduct arches facade culture cobbled pavement exterior construction town tree olive city grass historical heritage famous historic aqueduct destination touristic tourism travel towers fortification outdoor fort architecture building fortress medieval landmark merlons old traditional monument stone arch turrets cylindrical two wall castle portal entrance porta serpa beja alentejo portuguese portugal europe chaffered