
Portus Julius is an extraordinary underwater archaeological site in the Campi Flegrei area, where the remains of an ancient Roman military port built by Agrippa in 37 BC lie submerged due to volcanic bradyseism. Divers explore ancient quays, warehouse foundations, mosaic pavements, and harbor structures resting just meters below the surface. Fish swim through doorways that Roman sailors once walked through, and marine growth has softened the monumental stonework over two millennia. One of Italy's most significant underwater archaeological experiences, combining accessible beginner-friendly diving with over 2,000 years of naval history.
Dive Portus Julius with one of these PADI or SSI certified centers within 20 km.
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Sign InGreat spot for advanced divers. Currents can be tricky but the marine life makes it worth it.
One of the best dive sites in the region. Highly recommended.