用英语描绘世界名筑.请用描绘世界著名的5个建筑物.一个5句话.初二的英语水平

1.The Great Wall of China is a series of stone and earthen fortifications in China.The Great Wall stretches over approximately 6,400 km.It was maintained between the 6th century BC and the 16th century.It is used to protect the northern borders of the Chinese Empire from Xiongnu attacks.
2.The Sydney Opera House is located in Sydney,New South Wales,Australia.It was made a UNESCO World Heritage Site on 28 June 2007.Sydney Opera House is one of the world's most distinctive 20th century buildings,and one of the most famous performing arts venues in the world.