El Palacio de Bellas Artes Legend tells that the Aztecs were told by the gods to build their main city right where they saw an eagle eating a serpent on a cactus. It just so happened that where they saw this was in a middle of a lake, thus the Aztecs built Tenochtitlan (Mexico City) on an small island on a lake. In these days Mexico City is booming with people and their supply for water is very limited and they have been resorting to pumping out the water from underground aquifers causing the city to sink in to its muddy base. This is due to the drawdown which is happening since the water is getting used faster than it is being replenished. Since the city itself is close to a lake which stands at a higher elevation than them, they are also susceptible to many flash floods when it rains too much and the lake fills up. The Palacio de Bellas Artes is sinking down at an average of 4in a year! Mexico is quickly trying to find a way to hydrate its citizens, hopefully they can find a way to and at the same time maintain their amazing historical buildings
http://www.azcentral.com/news/articles/2010/04/08/20100408mexico-city-sinking-flooding-crisis.html
http://www.greatdreams.com/cities.htm
