Parco Nazionale del Circeo

In order to build a harbour on the shores of Lake Paola, and guarantee a second safe dock beside that of Astura, a remarkably wide and deep canal had to be dug across the dunes.

So massive was the excavation, that it required the realisation of a substructure under the northern escarpment: an opus reticolatum wall with limestone toothing, covered today by thick vegetation through which only few stretches can be seen.