Remains of the Walls of the Town of Alió Monument · Alió, Alt Camp, Tarragona The remains of the medieval walls of Alió, in the comarca of Alt Camp (Tarragona), form part of the village's medieval urban core and are declared a Cultural Asset of National Interest. The walled enclosure left its mark on the street layout: the present carrer de la Muralla recalls the route the old fortification once followed. Photo: CésarOP (CC BY-SA 3.0) What to see and do in Alió