At just under three square miles, tucked away in the Tyrrhenian Sea, the tiny Italian island of Ponza is a destination that somehow still manages to fly under the radar, despite stunning views, crystalline waters, and devotees including the whole Fendi clan. Anna Fendi owns an inn, the Villa Laetitia, on the island — as well as an outpost by the same name in Rome — and Silvia Venturini Fendi and daughters Delfina Delettrez and Leonetta Luciano Fendi regularly summer there at the family's gorgeous estate. And they're not the only ones: Italian It girls and boys and European Instagram celebrities are starting to catch on — see the best of Ponza on Instagram, here.