The main attraction near Vilalba is the Castro de Viladonga, one of the best-preserved Celtic hill forts in northwestern Spain.
The site was discovered in 1911 when a farmer's plough turned up a gold torque bracelet, prompting excavations that have continued since the 1970s. What has emerged is an almost circular acropolis of some 10,000 square metres, ringed by concentric walls and ditches. Inside, the remains of houses, corrals, warehouses, and communal buildings are grouped into districts along two main streets — a snapshot of daily life spanning seven or eight centuries, from the Celtic Iron Age through the Roman period.
A small museum beside the site displays torques, brooches, coins, and necklace fragments found during the excavations. The site is free to visit and gives a better sense of how these hill forts actually functioned than most of the more famous castros further south.