The World Map is a drill-down atlas: start at the whole globe, click a country to open its states or provinces, then click one of those for its districts — all rendered as real vector boundaries with d3-geo and SVG, not map tiles. The boundaries are same-origin static files, so the tool needs no map API key, account, tile provider, or geocoding request; choropleth values stay in your browser.

Depth varies honestly by what open data actually covers. The current snapshot has top-level provinces/states (ADM1) for 236 countries and territories, and 51 curated countries go one level further to districts (ADM2) — Turkey's 81 provinces and their ilçe, for example. Natural Earth's roughly 7,333 populated-place points appear with population and capital status and are scoped to the focused boundary. They are a useful mapped sample, not a complete list of every city or village. Village- or neighborhood-level polygon boundaries are not part of a complete open global dataset, so the map does not pretend to have them.

Hovering a region highlights its border and shows its name; clicking drills in with a short animated zoom into that region's bounding box (skipped automatically if your system has reduced motion turned on). A breadcrumb trail and a Back button retrace your steps, browser Back/Forward works the same way through a `?r=` URL parameter, and a search box jumps straight to any country or region by name without clicking through the hierarchy.

Beyond navigation, the map doubles as a small GIS utility: paste your own CSV or JSON data to color the currently visible regions as a choropleth with an auto-generated legend, then export what's on screen as SVG or PNG (or copy the PNG straight to your clipboard), or copy/download the GeoJSON for the region you're looking at.