A world map displays country outlines as light green paths with black strokes against a dark blue sphere. Hovering over any country turns it red, providing immediate visual feedback. The visualization uses D3.js v5 with the geoNaturalEarth1 projection and geoPath to render geographic features, while topojson processes the GeoJSON data. The dataset comes from the world-atlas package, loaded via JSON and TSV files that map ISO codes to country names.