Mexico City is a city of absolute contrasts. It is the oldest established city on the North American Continent; the Aztecs had been there almost 200 years the before the Spanish Conqueror Cortes arrived. It is also the highest metropolis at over seven thousand feet above sea level and is now the most populous city in the Americas with approximately 25 million people living in the metropolitan area. Yet the modern capital has retained much of the old Aztec heritage, as well as adopting a very strong Spanish influence following their conquest. And this is what gives the city its unique atmosphere, which even today still captivates the visitor.