Hillfort of Viladonga Nature · Castro de Rei, Terra Chá, Lugo A fortified settlement of some four hectares at 550 metres, occupied between the 2nd and 5th centuries and protected by several rings of slate walls standing up to fourteen metres above the ditch; it has been a listed cultural heritage asset since 2009. Photo: Xunta de Galicia (Attribution) What to see and do in Castro de Rei