Here are the lighthouses of Europe.

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

— Ethan Mollick (@emollick) January 24, 2022

And here are all the lighthouses in the world. (Sadly, not animated) https://t.co/dfM60toG1p pic.twitter.com/gfwXXmF6PS

— Ethan Mollick (@emollick) January 24, 2022

The data is from @openstreetmap, which is like a Wikipedia for maps, so if you see any lights missing you can add them. https://t.co/SDemlOhCI5

It is also a data source for other amazing map projects, like my all time favorite 👇 https://t.co/wHOEBigQSC

— Ethan Mollick (@emollick) January 25, 2022