Archaeological Site of La Almoloya Nature · Pliego, Río Mula, Murcia Bronze Age urban centre on a hilltop in the foothills of Sierra Espuña, the cradle of Argaric society between 1800 and 1400 BC. It was an important centre of political power, where a silver diadem was found, a piece unique for its period among those preserved in Spain, along with recent finds of defensive stretches and buildings built against the walls. Photo: Wikipedia / Wikimedia Commons (CC BY-SA) What to see and do in Pliego