With more than 17,000,000 people, many of them living in shanties, Mexico City is the world's second largest metropolitan area. In 1985 the city was rocked by an earthquake that left 9,000 dead and 95,000 homeless.
Tourism and petroleum products are leading earners of foreign exchange.
More than 14,000 documented archaeological sites testify to the dazzling past of the Mayan and Aztec civilizations.