To supply water to the Royal Palace of Caserta and, more generally, to meet the needs of the Palace and the city, Carlo di Borbone initiated the construction of a new aqueduct, which took his name: Acquedotto Carolino. For this project, the king commissioned Luigi Vanvitelli to produce hydraulic engineering artwork, which attracted the admiration of the whole of Europe and still remains one of the most important achievements of the Bourbons today. The above ground section, in fact, is an imposing tufa structure with three rows of round arches that soars 60 metres high and stretches about 500 metres. The aqueduct course is buried for most of its 38 km, with a few canal bridges. In addition to the bridges in Valle, which cross Valle di Maddaloni (Caserta), the most important are the Carlo III bridge in Moiano, which intersects the Isclero river, and the Valle di Durazzano bridge, both in the province of Benevento.