Castro of San Cibrao de Las

It is a hill fort of the so-called castro culture.

Rather than a single castle, it encompasses an entire fortified town or village.

It flourished during the first century, at the beginning of Roman rule in Galicia.

[1] The ruins are located on a 473-metre-high hill, covering an area 384 m long and 314 m wide.

Unlike the other hill forts of the area, there are many straight walls and fewer curving structures.