Carballo has been inhabited since ancient times, which is evident from its historical and artistic heritage. Thus, the Megalithic era left its mark on the famous dolmen the "Pedra Moura", while the "Castreña culture" still substantial forts are preserved and the example of these are, the Castro of Cances (also known as Bico de Castro), Castro Torre Pardiñas (castro of reduced dimensions with a predominantly defensive role), the forts of Guntian and Cotomil (which still retain some of its defense walls), and Castro de Vilela and Nion (noted for its complex structure).