Dogana d'acqua, Customs border at Navicelli channel, Livorno, Italy

The Dogana d'acqua stands along the Navicelli channel, combining a modern steel and glass structure with preserved elements from the original building. It was reconstructed in 2014 following a municipal competition and now functions as a logistics and technology center while keeping its historical character.

Construction began in the 1830s under Grand Duke Leopold II of Tuscany to expand the free port zone between Fort San Pietro and San Marco Gate. The building marked the boundary between controlled trade territory and the rest of the port.

The customs post took its name from its function: a water customs barrier on the Navicelli Canal, where goods carried by boat between Livorno and Pisa were checked. The rear ruins are where those inspections took place. On the central arch of the three-arch bridge, cast-iron ornamental dolphins designed by Carlo Reishammer can still be seen.

The remains stand where the Navicelli canal meets a road junction, with a reinforced-concrete viaduct skirting the western side; the three-arch 19th-century bridge carries the glass case. A metal footbridge over the canal, restored and reopened on 31 July 2013, gives pedestrian access. The site is an open crossing, so watch traffic rather than expecting a marked entrance.

Two large docks were originally excavated around the customs post: an inner rectangular basin and an outer semicircular one, both filled in later for urban development. These vanished waterways once shaped how goods moved through this checkpoint.