For an upscale night out, head to Puerto Madero alongside the eastern Rio de le Plata riverbank.

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The toxic smoke affected Puerto Madero, Congreso, San Telmo and other central areas of the Argentine capital.

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In 1911, after leading the revolution against dictator Porfirio Diaz, Francisco Madero assumed the office of president of Mexico.

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"We wanted to be in a Nafta business, " says Madero, Sanluis' 60-year-old chairman.

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The ambitious restoration recalls what he'd done for the Puerto Madero district of Buenos Aires, a project he began 10 years ago.

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In Buenos Aires both ends have high visibility sites: Puerto Madero for the wealthy and La Salada for the poorer.

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When gold and silver prices skyrocketed in 1980 and 1981, Madero and the board decided to use the windfall to diversify out of mining.

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Fresh tacos, fruit juice, coconuts and fish can be easily found at stalls near Mercado Mexicano (also a good place to purchase a range of Mexican handicrafts), located at Calles Madero and Hidalgo.

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The less visible multiplication of gated communities is actually far more noxious than it is Puerto Madero (a highly regarded architectural rehabilitation of an old dead harbor into a high-end space for offices and commerce).

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And the newest architectural development in the city can be found along the shores of the River Plate in the Puerto Madero neighbourhood, where shiny skyscrapers house some of the costliest real estate in Buenos Aires.

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