You enter Fos via a magnificent avenue lined with ancient Aleppo pines, like a bridal arch. You will then quickly find yourself at the foot of the Hauture, the name given to the 39 m high rocky promontory of Fos, from the top of which you will have an uninterrupted view of the region and the town. Standing on this rock is the château, called the Castrum de Fossis, first mentioned in 923. It is one of the oldest châteaux in lower Provence.

Park on the market square (it's too difficult to park on the village rock). Then follow the new access ramp and enter this fortress via the Northern Gate. From the parapet walk you will see the keep (erected in 1200), and from a walkway overlooking the most recent archaeological excavations you will see the foundations of the Castrum's primitive tower.

Don't forget to visit St Sauveur church afterwards. As you walk back down towards the village, you'll be able to admire the other side of Fos; its little houses, shady squares, cool fountains, café terraces where the locals share a joke as they play cards ... in other words an authentic Provençal village. You can also take a look at the village museum (at the tourist office) to discover life at Fos as it was lived at the beginning of the century. Automated figures and figurines bring to life a series of scenes showing daily life in Fos during this period.

Over the last few years Fos has been seeking to change its image, attract tourists and encourage them to forget about its polluting industrial activities. It is protecting and promoting its historical heritage, and already possesses wonderful natural areas. It offers a series of beautifully kept fine sand beaches with many facilities, extending over more than 6 km. There are no less than four beaches. It is making an effort to achieve the required level of comfort and quality for a seaside resort. Its beaches are clean and the water quality is closely monitored.

You can also enjoy exciting boat trips starting from Fos, heading for the Camargue and the Côte bleue (calanques of Cassis, Carry le Rouet), cruise on the canals of Martigues and St Chamas Bay, reel fishing in the Mediterranean, scuba diving in the sea …i.e. everything to erase Fos' negative image and emphasise the town's positive aspects.