| UPDATED: 19:04, Fri, Mar 19, 2021
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Egypt: Explorers find 'strange door' under Great Pyramid of Giza
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Located on the Giza Plateau, the colossal monument is believed to have been built during the Fourth Dynasty for the Pharaoh Khufu. One of the Seven Wonders of the Ancient World, it is the only one still largely intact and is believed to have been constructed more than 4,500 years ago. There are three known chambers inside – the lowest was cut into the bedrock upon which the pyramid was built and is believed to have been unfinished.