Last time I talked about the Expo Hall, the show floor for video games, and the Tabletop area, the show floor for non-video games. They are, however, a fraction of the entire convention.
They comprise the majority of the bottom most floor of the convention center. The floors above it consist of a single hallway that wraps around the inside edge of the building leading to various rooms filled with various additional activities. The most notable, or at least the most widely advertised, are the panels.