Urban Hills, Mexico City

The Mexico City metropolitan area population is 21.2 million people, making it the largest metropolitan area in the western hemisphere, the fifth largest agglomeration and the largest Spanish-speaking city in the world. As an "alpha" global city, Mexico City is one of the most important financial centers in North America.  It is located in the Valley of Mexico (Valle de México), a large valley in the high plateaus at the center of Mexico, at an altitude of 2,240 metres (7,350 ft).