South America’s Pacific edge lines up with the Great Lakes
On many familiar maps, South America appears to sit mostly west of North America. But the continent’s far-western tip, Punta Pariñas in Peru, is near 81 degrees west longitude—close to the longitude of Michigan’s eastern side. Follow that line south on a globe, and it carries you from the Great Lakes region toward Peru’s Pacific coast.
Longitude measures position east or west around Earth. Places that share a longitude lie on the same north–south line, so this comparison reveals a less obvious alignment than a quick glance at a flat map does.
Why the map can fool your eye
A flat map has to represent a curved planet, and every projection alters some aspect of the view: shapes, areas, distances, or directions. The familiar north-up layout also encourages a simple mental picture of the continents as separate blocks, with South America neatly tucked beneath North America. Their coastlines do not actually line up that way.
South America stretches far east as well as south. Its easternmost point, in Brazil, reaches deep into the Atlantic, while its westernmost point reaches back toward the same longitudes as the Great Lakes. The continent spans a much wider east–west range than its familiar silhouette suggests.
That is why tracing a meridian can be more surprising than tracing a border: from Michigan, a line south can point not toward the middle of the Pacific, but toward the western edge of South America.
