Los Milagros aqueduct or aqueduct of miracles aerial view rising away from ancient ruin brick pillars in Mérida, Spain

los milagros aqueduct aqueduct miracles aerial view ancient ruin brick pillars merida spain civil engineering construction proserpina reservoir world heritage site roman supply water archaeology antique arch archway estremadura architecture bridge culture extremadura heritage historical history landmark old rome spanish town tourism stone unesco historical building miracle pillar monument urban aged structure destroyed granite infrastructure