The Isole Tremiti are an archipelago in the Adriatic Sea, north of the Gargano Peninsula. They constitute a comune of Italy's Province of Foggia and form part of the Gargano national park. The name of the islands relates to their seismic hazard, with a history of earthquakes in the area: tremiti means "tremors". The islands were used for the internment of political prisoners during Benito Mussolini's Fascist regime. This was nothing new: two millennia earlier Augustus had exiled his granddaughter Julia the Younger to one of these islands (then named Trimerus in Latin, maybe from Greek Trimeros, Τρίμερος, meaning "three places" or "three islands"). The islands are now an important tourist attraction because of the clear waters surrounding them. Up to 100,000 visitors come to the islands in the summer season. Ferry services from the mainland operate from Termoli, Vieste, Rodi Garganico and Capoiale, while Alidaunia offers flights from San Domino Heliport to Foggia and Vieste