It was discovered in 1913 and for decades archaeological excavations were carried out that confirm the importance of this fort in the fortified culture.

The Castro de Santa Trega is the most important example of the fort culture in the northwest of the peninsula due to its extension and the materials discovered during the excavation campaigns. You can see part of the structure of the fort that was excavated and consolidated. In addition to two rebuilt homes. Its extension exceeds 20 hectares and it is considered a town since it was inhabited by more than 4,000 people, which implies a significant urbanization of the space.Currently, less than 20% of the fort is exposed and the best preserved part is located around the access road to the summit.