This interactive visualization presents the hierarchical structure of world countries, organized by continent and subregion. Using a tidy tree layout, the SVG renders country names as text nodes connected by green paths, with the root labeled “World.” The visualization employs D3.js v5 with the `tree()`, `hierarchy()`, and `linkHorizontal()` APIs to compute and draw the layout. Users can zoom and pan the entire view via the `zoom()` interaction, while the font size scales with tree depth. The data comes from a structured JSON file representing geographic groupings.