The Casteddu d'Araghju, a prehistoric Bronze Age fortress, stands at an altitude of 245 m on a rocky spur overlooking the Gulf of Porto-Vecchio. Listed as a historic monument since 1974, it bears witness to more than 4,000 years of history.
The circular enclosure measures around 40 m in diameter, with walls 2 to over 3 m wide and 3 to 5 m high depending on the sector, and features two monumental entrances covered with heavy flagstones.
The site includes several small rooms, a parapet walk, a central square and a tower (the «torra»), the remains of an upper storey, some of which can still be seen. Excavations by Roger Grosjean, starting in 1967, unearthed fragments of pottery, a large millstone, fireplaces and rooms that may have been used for temporary housing or refuge.
Accessible from a car park in Araghju, a short path, after crossing a stream, leads up through rocks and vegetation to this promontory. Access is free.
