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.
Made with @openstreetmap, Leaflet, and the Overpass API.
https://geodienst.github.io/lighthousemap/
From the Geodienst researchers of Groningen University (NL), via Ethan Mollick