A true feat of archaeology, the Pyramids of Egypt have to been seen to be believed. One of the "Seven Wonders of the Ancient World", these spectacular creations soar as high as 481 feet (147m) and were constructed around 2,550 BC. Today, the pyramids typically attract millions of tourists each year, and for good reason. As well as being entirely imposing to look at, the structures were built as tombs for the country's pharaohs – yet exactly how remains a puzzle.

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