For whatever reasons, Mexico City must always have the tallest skyscraper in Latin America. Rem Koolhaas wanted to make a major upgrade to that claim with the Torre Bicentenario not long ago, but that project pretty much fell apart under political pressures. Anyway the tallest building in Mexico and in Latin America right now is the Torre Mayor. But right next-door in just a few years, the Torre Mayor will be surpassed by the Torre Reforma, seen above.
Skyscraper News says this new building will have three levels of visible sky gardens. The Torre Reforma, at 244 meters, is expected to be completed by 2011. It's going to look like some sort of translucent prism, or a stick of webby Kryptonite.
Online there's no better place to geek out on cities and their skyscrapers than Emporis. Here's the Mexico City page. And here is a shot of Paseo de la Reforma, taken April 8, from the balconies of the Castillo de Chapultepec, with Torre Mayor looming on the left.
* Image above via Skyscraper News. * Post edited.