entrance to castillo de san cristobal

access ancient arch architectural architecture bastion blue brick bricks building castillo cloud clouds coast cobble construction cristobal detail details east entrance facade for fort fortification fortress front gate gates gray history horizontal juan landmark landscape masonry medieval monument monumental north ocean old oldtown orange out outside puerto ramp ramps rico road roads san scene scenic sea side sky spanish spire spires stone stones stonewall stronghold structure tourism travel view village wall walls war white window windows