Castle and Walled Enclosure of Alforja Monument · Alforja, Baix Camp, Tarragona The castle of Alforja, probably of Roman origin, was later used as a residence by the archbishops of Tarragona. The walls surrounding the village remained standing until 1931, but almost entirely disappeared in the 1960s; today only a gate and some remains of the castle itself survive. Photo: Viquipèdia / Wikimedia Commons (CC BY-SA) What to see and do in Alforja