Le Formichine is a submerged shoal off the northern tip of Capraia Island inside the Tuscan Archipelago National Park, reachable only by boat from the island's small port. The shoal cap rises to a mid-water plateau, then the wall edge drops steeply into open water offering a dramatic profile of vertical rock faces, red sponges, and parazoanthus colonies. Divers descend the anchor or descent line into the current, redeploy onto the wall, and move clockwise, letting the flow carry them along the structure. The site draws large schools of barracuda, resident groupers, moray eels, octopus, and corvina; a large eagle ray with an impressive wingspan has become a regular presence along the sandy base. Current is typically moderate but can strengthen sharply when Maestrale or Libeccio winds blow, so conditions should be confirmed with a local operator before diving.