This interactive visualization shows a hierarchical tree of world regions and countries using a horizontal icicle layout, with the root "World" branching into continents, subregions, and individual nations. The SVG rendering uses D3.v5’s `tree()` layout and `linkHorizontal()` path generator, while custom zooming is enabled via D3’s `zoom()` interaction module. Text labels are sized inversely to depth, and the underlying JSON data structure is parsed with `hierarchy()` before layout.