Alarcos is a small hill and archaeological site located in the Campo de Calatrava region of the Iberian Peninsula. Standing at 685 metres above mean sea level, the hill is made of quartzite rocks together with lithic components of volcanic origin, and the Guadiana river flows next to it. It features an archaeological site on top, in between the Spanish municipalities of Poblete and Ciudad Real. The archaeological sites features a Bronze/Iron Age Iberian oppidum, as well as a phase of medieval occupation, which includes the . The site was declared Bien de Interés Cultural in 1992.