Like most Corsican cities, Ajaccio has a citadel built by the Genoese republic in four stages between 1492 and 1789. It’s hexagonal and composed of six bastions. It dominates the Gulf of Ajaccio, and played a defensive role in the city for many years. It’s unique because it’s open to the general public. For a long time, it remained under military rule. Once, a mysterious thief planned a heist of the citadel since it was rumored to contain a fortune during the transition from francs to euros. To get there, follow the beach of Saint François, located downtown. You’ll enjoy a wonderful view of the city and the turquoise sea.