These caves located south-east of Ponza’s harbor are believed to be an elaborate example of a Roman fish farm. The caves were dug into the island’s volcanic rock around the 1st-century CE, and formed five basins connected to each other via underwater passages. These were used to change the water and move fish and eels from one basin to another. Moray eels were greatly appreciated by Roman elites and the caves in Ponza seem to have served as farms for specific species of eels. The position of the caves are…
