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Map of the Lighthouses of the World
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From mapped.earth, a map of every lighthouse on the planet, along with other charted lights like lighted buoys and such. The screenshots above are static but the lights on the real map move: each lighthouse sweeps out its actual arc and the reach of the beams is true to scale. I recorded a short video of how it looks on the site:
Each lighthouse has a unique light characteristic so that ships can tell them apart:
In any of these designs an observer, rather than seeing a continuous weak light, sees a brighter light during short time intervals. These instants of bright light are arranged to create a light characteristic or pattern specific to a lighthouse. For example, the Scheveningen Lighthouse flashes are alternately 2.5 and 7.5 seconds. Some lights have sectors of a particular color (usually formed by colored panes in the lantern) to distinguish safe water areas from dangerous shoals. Modern lighthouses often have unique reflectors or racon transponders so the radar signature of the light is also unique.
See also A Blinking Map of the World’s Lighthouses. And mapped.earth has more cool visualizations of the Earth (rainfall, wind, lightning, pollution, etc.)