The Peristera shipwreck (Greek: Ναυάγιο Περιστέρας) is an underwater shipwreck of a 5th-century BC merchant vessel at a depth of 20 metres (66 ft), just off the islet of Peristera near Alonissos. Its cargo of 3000-4000 amphoras made it the largest transport ship yet known of its period when excavation began in 1992, and it carried wine from Mende and Skopelos. In addition to amphoras, the ship transported many valuable items including black-glazed cups, plates and bronze tableware. The site was opened to the public for scuba diving visits as the Alonissos Underwater Museum (Υποθαλάσσιο Μουσείο Αλοννήσου) in 2020, the first such underwater museum in Greece.