Marina Piccola, Capri

What Seaglassmap found here

Capri's south-facing pebble bay, under the Faraglioni. The glass collects in the stones and nooks below the bathing-establishment decks rather than on the open shingle. That's where the collector who wrote this up filled two handfuls in one stop, all small to medium pieces. Come out of season: this is one of the busiest beaches on the island in summer, and there's nothing left under a hundred sunbeds. Take the glass, leave the pebbles: removing beach material is an offence in Italy.