The Acueducto de los Milagros ("Miraculous Aqueduct") is a ruined Roman aqueduct in Mérida, Spain. Only a relatively small stretch of the aqueduct still stands, consisting of 38 arched pillars standing 25 metres (82 ft) high along a course of some 830 metres (2,720 ft). It is constructed from opus mixtum - granite ashlar blocks interspersed with red brick - utilising a double arcade arrangement. The structure originally brought water to the city from a reservoir called the Lago de Proserpina, fed by a stream called Las Pardillas, around 5 km (3 miles) to the north-west of Mérida.

It is thought to have been constructed during the 1st century AD, with a second phase of building (or renovations) around 300 AD. In later centuries, the inhabitants of Mérida dubbed it the "Miraculous Aqueduct" for the awe that it evoked.

(Wikipedia)