seascape with the great cliff with people walking in the corridor to access to the neptune's grotto

cliff neptune 039 grotto grotta nettuno sea sardinia path access alghero seascape cave touristic aerial italy mediterranean coastline entrance famous attraction tourist people spot space for text copy natural touristy nature panorama scenic landscape cliffs cliffside view coastal outdoor landmark travel adventure heritage coast vacation blue water island summer destination scenery tourism site panoramic great walking corridor neptune#39aph39#s dug middle