The site of the Fuente del Hierro is located in a hollow under San Pedro de Río, within the domain of the old farmhouse of Can Marqués (Tordera).
For him runs a torrent that empties into the Pineda stream. The hollow was partially disfigured with the construction of the C-32 motorway in 1994. The environment degraded and led to the disappearance of a popular force ferruginous water mine (hence its name Fuente el Hierro). Starting in 2007, various public interventions have been carried out and the fountain and the surroundings are recovered, although with a jet of water different from the old one.
A few meters away, crossing the stream, in Roman times an archway was built that is included in the same water conduit as the section of the Can Cola (Pineda de Mar) aqueduct. The archway has been consolidated in two complementary archaeological interventions throughout 2012.
The aqueduct, according to the study by F. Prat y Puig, was a hydraulic work that took the water from the Pineda stream just above Can Bofí. Along a route of about 3.5 km more or less parallel to it, it would reach the place of the Can Roig farmhouse (Pineda de Mar), where vestiges of a Roman settlement have been documented that probably belonged to an important landowner, promoter of this remarkable infrastructure.
The aqueduct channel spans the Fuente del Hierro stream through a beautiful single semicircular arcade, 3.13 meters in diameter and a height of 3.40 meters above the stream bed. On top of it the conduction takes place with an impermeable pavement made of lime mortar and tile chips (opus Signium) typical of Roman techniques. The canal would have a protective cover, now gone. To the south of the arcade, archaeological excavations showed that the canal turns towards the Pineda stream.