Mercusuar
Mercusuar iku wangun yasan menara minangka didadèkaké sumber cahya ing dhataran kang dhuwur uga duwé mupangat kanggo mbiyantu navigasi kapal sagara. Sumber cahya kang digunakaké jinisé wujud warna saka lampu nganti lensa uga  (ing mangsa biyèn migunakaké) geni.

Karana kamajuan jaman kang sansaya maju navigasi kapal sagara dibiyantu déning GPS, cacahé mercusuar ing donya ngalami kamudunan saka 1.500 mercusuar.Mercusuar duwé mupangat dadi pertanda ing laladan-laladan bebayan kaya ta karang utawa laladan sagara kang cétek

Salah sijiné mercusuar kang paling misuwur ing donya ya iku Pharos ing Alexandria, kang kagolong dadi pitu kajaiban donya Pitu Kaajaiban Donya Kuna.

Pranala njaba 

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