The Lighthouse of Alexandria in Egypt was one of the Seven Wonders of the Ancient World. Ancient Greek writers say that this tower was so tall that the beacon at the summit could be seen for hundreds of miles.

Today archaeologists and engineers investigate the truth behind this lost wonder – how tall was it, what did it really look like and how did a stone skyscraper survive earthquakes for more than a thousand years?

Did this remarkable structure also contain a mysterious ancient weapon – a so-called death-ray that could supposedly set enemy ships on fire?

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