Some tiny, deserted beaches exist on the island of Santa Catalina. It's worth a look if only to see Morgan's Head, a rocky cliff in the shape of a human face, best seen from the water. An underwater cave is at the base of the cliff. The shoreline changes considerably with the tides; during high-tide, beaches get very narrow and some totally disappear. To explore the island's attractive coastline, take the path to the left after the pontoon bridge.
