The Great Wall of China is one of the most iconic Postcard

The Great Wall of China is one of the most iconic landmarks in the world and is also one of the largest building projects in human history. The wall stretches for over 13,000 miles across northern China and was originally built over a period of more than 2,000 years, beginning in the 7th century BCE. The wall was constructed using a variety of materials, including brick, tamped earth, stone, and wood, and was designed to protect the Chinese empire from invasion by nomadic tribes from the north. Despite its massive size, however, the wall was not always an effective defence and was breached several times throughout its history. Today, the Great Wall is a popular tourist attraction, and visitors can walk along its battlements and explore its many watchtowers and fortifications, which offer stunning views of the surrounding landscape.