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15 December, 15:28

They were most massive man-made structures until the 20th century

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  1. 15 December, 18:57
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    The Colosseum, the Great Pyramid of Giza, the Great Wall of China and Machu Picchu are world-famous ancient architectural wonders, but they’re hardly the only man-made structures worthy of effusive praise, enthusiastic photography and economy-stimulating tourism.
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