This map of England displays its geographic regions as solid coral shapes, with black lines denoting the boundaries between them. The visualization is built with React and rendered as SVG, using d3.geoNaturalEarth1 for projection and d3.geoPath to generate the region paths. The geographic data is fetched as a TopoJSON file, which is then converted into features and interior boundaries using the `feature` and `mesh` functions from the topojson library.