The Acronafplia is the Acropolis Nafplio. The Turks called the Its-Kale, an inner fortress. The fort was built by the Franks, came to the hands of the Byzantines and then the Turks. The Acronafplia were preparing to war in 1821. In Kapodistrian years, built a church and a hospital. Later the fort became a «prison Kolokotroni I.», which was driven there on charges of involvement in organizing and action against the regime. Accused of conspiracy and Petrompeis Mavromichalis, followed in 1821 the fate of Morias Gerou, imprisoned in that fortress.

The Acronafplia for many years, was the prison for political prisoners and repression of opposition. Today, prisons are katedafisthei in place and has built luxury hotel.

The Rock of Acronafplia, inhabited from prehistoric times, it offers visitors a panoramic view and excellent: The Old Gate, the only Bourtzi, the majestic presence of the bay of Nafplio, the charm of Argolic plains and the beauty of the beach Arvanitias. The many steps to walk in Acronafplia, compensate the guest. For the less romantic, the asphalted road leads to the top and an entrance to the castle.