Mexico City is built on the site where the Aztecs founded their capital of Tenochtitlan. The city, located in a high mountain basin, was built on an island in the middle of a shallow, saline lake. Actually, there were a number of interconnected lakes in the valley. The largest of them was Lake Texcoco. Beginning in colonial times efforts were made to drain off the lakes in order to control flooding. Today there is only a remnant of that lake system. Nevertheless, even though Mexico City is landlocked and 200 miles from the ocean, its beginnings as a city on an island in a lake have influenced a large part of its history.
Currently in the courtyard tucked between the Latin American Tower and the Church of San Francisco there is an exhibit of historic images and photographs that portray the city on the water.
That aqueduct ended at a colonial era fountain in the city known as "Salto de Agua". The original fountain is now in the National Museum of the Viceroyalty. An exact replica now stands in its place in the middle of multi-laned Arcos de Belén Avenue.
The draining of Lake Texcoco did not end the problem of periodic floods. This photo from 1865 shows a flooded street in the center of the city. Entrepreneurial locals would build wooden footbridges across the streets and charge people 6 cents to cross them.
