The Cheops Pyramid: At a height of around 146 meters, the monumental structure was the tallest building in the world for more than 4,000 years. As the only surviving wonder of the ancient world, the Great Pyramid still attracts countless visitors from all over the world. Though the world-famous Pyramids of Giza and the no less famous Sphinx are among the most breathtaking structures in history, they still hold some great mysteries many centuries after their completion.
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