Chapultepec is a mound springing up from the plain to the height of probably three hundred feet, and almost in a direct line between Molino del Rey and the western part of the city.

It was fortified both on the top and on the rocky and precipitous sides.
The City of Mexico is supplied with water by two aqueducts, resting on strong stone arches.

One of these aqueducts draws its supply of water from a mountain stream coming into it at or near Molino del Rey, and runs north close to the west base of Chapultepec; thence along the centre of a wide road, until it reaches the road running east into the city by the Garita San Cosme; from which point the aqueduct and road both run east to the city.

The second aqueduct starts from the east base of Chapultepec, where it is fed by a spring, and runs north-east to the city.

This aqueduct, like the other, runs in the middle of a broad road-way, thus leaving a space on each side.