Zarza la Mayor, posible Interania romana Historical milestone · Zarza la Mayor, Comarca de Alcántara, Cáceres Several Roman funerary plaques suggest that Zarza la Mayor may have been the Roman town of Interania, which would have contributed to the construction of the Roman bridge of Alcántara; a Roman road linking Castile to that bridge passed through its municipal area. Photo: Juanchele (Public domain) What to see and do in Zarza la Mayor