The Great Wall of China
The Great Wall of China, a series of fortifications made of stone, brick, tamped earth, wood, and other materials, was built along the northern borders of China to protect against various nomadic groups.
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Machu Picchu is a 15th-century Inca citadel located in the Eastern Cordillera of southern Peru on a mountain ridge.
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The Taj Mahal, located on the south bank of the Yamuna river in the Indian city of Agra, is an ivory-white marble mausoleum commissioned by Mughal emperor Shah Jahan.
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