the lighthouse of Alexandria
Of the Seven Wonders of the Ancient World, only one had a practical use in addition to its architectural elegance: The Lighthouse of Alexandria. For sailors, it ensured a safe return to the Great Harbor. For architects, it meant even more: it was the tallest building on Earth. And for scientists, it was the mysterious mirror that fascinated them most... The mirror which reflection could be seen more than 50 km (35 miles) off-shore.
It is located on the ancient island of Pharos, now a promontory within the city of Alexandria in Egypt.
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