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Lighthouse | Definition, History, Equipment, & Facts | Britannica
Lighthouse - Wikipedia
14 Must-See Lighthouses Around the U.S. - National Trust for …
9 of the World's Most Notable Lighthouses - Treehugger
Lighthouse facts: 10 things you may not know | CNN
History of lighthouses - Wikipedia
lighthouse summary | Britannica
Lighthouse Facts | The Lighthouse Preservation Society
Home - National Lighthouse Museum
Lighthouse of Alexandria | History, Location, & Facts | Britannica