An outline with everything else taken away. Eighty real coastlines, islands and lakes, traced from public-domain survey data.
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The outlines are real and public domain. They come from Natural Earth, which places its data in the public domain, extracted once when this drawer was built rather than fetched at each visit — so nothing here calls out to anybody while you play, and no library was added to draw them.
Each shape is flattened honestly. The largest ring of the largest polygon is taken, then simplified with Douglas–Peucker down to about a hundred points — enough to keep what makes a coastline recognisable and not so much that the file becomes a map. Longitude is multiplied by the cosine of the shape's own mean latitude before scaling, which is the bit that matters: without that correction Norway and Greenland come out stretched sideways into something nobody would recognise.
Everything else is removed on purpose — no north arrow, no scale, no neighbours. Each shape is normalised to the same box, so size is not a clue either: the outline of Lake Erie is drawn as large as the outline of Brazil. The only thing you are given is the shape.
The map in the reveal is the cabinet's own world outline, and the marker sits at the shape's real mean longitude and latitude.