The balcony village of Sainte-Agnès in the Alpes-Maritimes department opens to the Mediterranean Sea. Its intertwined alleys and medieval houses testify to its centuries-old history. The locality is full of pebble-paved narrow streets spanned by vaults and darkened by houses erected in height. Near the village, the fort of Sainte-Agnès, whose southern block was the most powerfully armed frontal casemate of the entire Maginot Line, forms a kind of second underground village, dug into the depths of the rock.