Here are the lighthouses of Europe.
— Ethan Mollick (@emollick) January 24, 2022
The map is even better than it might seem at first glance: the colors are the real colors, the patterns are the real patterns, and the size of the dots is the distance at which each light is visible. https://t.co/y7QzV1v7GF pic.twitter.com/9Zbh4Da62B