entrance to the puka pukara red fortress, ruins of inca fortress built from deep red color stone, located on the hilltop of cusco

doorway entrance arch fort citadel fortification red fortress puka pukara puca pucara sacred valley inca cusco region peru south america empire military historic ancient ruins remains old architecture structure defense stronghold stone wall mountainside beautiful impressive amazing stunning view green grass field meadow landscape sky outdoors daytime travel tourism attraction visit holiday vacation leisure selective focus built deep color located hilltop