The castro de Santa Trega is a Galician fort and an archaeological site that is located in the most southwestern corner of Galicia, in the municipality of A Guarda (Pontevedra) it is a privileged place from which the entire contour of the mouth of the Miño is dominated . It belongs to the Castro culture, the most emblematic and visited of the Galician forts. It was declared a National Historic-Artistic Monument in 1931 and is also considered an Asset of Cultural Interest. In several of the stones of the mountain are petroglyphs made 2.000 years before the occupation of the castro, so it had a continuous occupation between the XNUMXst centuries BC. C., shortly after beginning the process of Romanization of Galicia, and the XNUMXst century AD. C.