La Margineda Bridge is located on the high road that went from Sant Julià de Lòria to Andorra la Vella, via Santa Coloma. The structure runs over the Valira River, the country’s main river running along the main road to the capital.

It is one of the few Romanesque bridges from the 12th century. The largest and narrowest of all the Principality’s mediaeval bridges, it runs 33 metres long and has a maximum height of 9.2 metres. The bridge is ridged and its paving runs along the entire structure, like that on the rest of the road.