large volcanic boulders impede the course of the alcantara river near taormina, sicily

alcantara basalt bay beach blue boulder boulders canyon catania columns course culture erode etna flow gap gorge history impede italy landscape large lava mediterranean mount mountain nature outdoors peloritani picturesque ravines religion river rock sand sea secluded shore sicilia sicily sky stone summer taormina tourism tradition trail travel tree turbulent turquoise volcanic water waterfall