This interactive dendrogram visualizes the hierarchical structure of world countries, organized by continent and subregion. The tree layout uses horizontal branching paths to display parent-child relationships, with country names rendered as text labels. Built with React and D3 v5, the visualization employs the `d3.tree` layout algorithm, `d3.linkHorizontal` for path generation, and `d3.zoom` for pan and zoom interactions. Data comes from a JSON file containing the geographic hierarchy, and the SVG output is styled with CSS.