The Merchandise Mart is a Chicago icon. This is actually my first vig, and was a Christmas present to my mother, who works there. In this section, we find the Mart, with 22 floors, and more floor space than any other building ever built! Along with the two draw bridges, which are located at either side of the building. The Wall, located on the Chicago River, is the visitor parking, and located on this Wall, are busts' of past presidents of the Merchandise Mart. I know, the river should be green, but I didn't have a color green funky enough. FunFact: In the movie: Percy Jackson, the elevators seen in the previews are actually the Marts' elevators, which are notoriously fast.