At the height of its power, the city of Angkor was believed to have spanned 100 square miles (260 square kilometers) and to have been inhabited by as many as 1 million people. More than 1,000 temples were believed to have been built in Angkor. In the 15th century the city was mysteriously abandoned, and the jungles slowly encroached on the ancient city, burying the ruins beneath a thick carpet of vegetation.

� Britannica

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