This visualization displays the hierarchical relationship between continents, regions, and countries using a radial tree layout. The data is structured as a nested JSON object with the world as the root and geographic subdivisions as children. The example uses D3 v5 and renders an SVG, applying d3.tree and d3.hierarchy to compute the layout, with curved paths linking parent and child nodes. The clean, minimal design uses a teal stroke for connections and the Playfair Display serif font for labels, with text shadows improving readability.