This visualization presents the World Countries Tree, a hierarchical layout of global geography organized from continents down to individual nations. Built with D3 v5, it employs the `tree()` layout and `linkHorizontal()` path generator to create an interactive, zoomable SVG diagram. The hierarchical data structure, loaded from a JSON file, defines parent-child relationships between regions. Users can pan and zoom using D3’s `zoom()` behavior, while text labels scale in size based on depth, emphasizing the tree’s branching structure.