A world map displays circles marking cities that hosted international football games between 2010 and 2020, with circle size proportional to the square root of the game count per city. Data comes from a Kaggle-derived CSV. The visualization uses D3 with a `d3.geo.equirectangular` projection and `d3.geo.path` for rendering country boundaries from TopoJSON. Pan and zoom are implemented via `d3.behavior.zoom`. Hovering over a circle reveals a tooltip with the country, city, and total games.