The Aqueduct of Chapultepec is a reminder that Mexico City's water engineering did not begin with the Spanish. The Mexica built an aqueduct here in the 15th century to carry spring water from Chapultepec toward the island city of Tenochtitlan, long before the colonial city grew around it.
The surviving arches stand near the Reforma corridor, so they work best as a short historical stop while walking between Chapultepec, Zona Rosa, and the centre. They are not a full museum visit, but they add useful depth to a part of the city usually seen through monuments from much later periods.