As the year draws to a close, peloton takes a look at the moments that define the racing season and their iconic images. We started with the monuments-the great single day races- and took you through the season's key build-up events. This week, we look at the three grand tours: the Giro d'Italia, Tour de France, and Vuelta a España. These are the larger-than-life events that truly put cycling on the world stage, reaching its fevered pitch in the hot summer days of July. Each grand tour has its own flavor and its own mystique.