St. Catherine's monastery, UNESCO World Heritage Site, Sinai, Egypt, North Africa, Africa

africa weakening wall unesco world heritage site turret travel destinations travel tower tourist attraction structure stone st catherine's monastery st catherine's monastery security saint catherine's monastery safety ruins rock protection preservation photography people outside outdoors northern africa north africa monastery landmark horizontal history historical landmark historical high angle view heritage fortress fort egyptian egypt deteriorating deteriorate defense defence daytime day culture conservation colour color image color civilization civilisation change building background people architecture archeology ancient civilization ancient civilisation ancient african