Great wall China
The purpose of the Great Wall of China was to protect the Chinese states and empires from attack and invasion. It runs across the historical northern borders of China and runs from Dandong in the east to Lop Lake in the west. It is a series of fortifications that were built using a range of materials, including stone, brick, wood, and earth. The wall has been added to over the centuries, but the earliest parts of the wall date back to the 7th-century BC. The most famous part of the wall is the section built between 200 and 206 BC by Qin Shi Huang who was the first Emperor of China. Most of the remaining wall is from the Ming Dynasty between 1368 and 1644. The Great Wall of China is one of the most significant landmarks in China and is a huge attraction for tourists who visit the country. Whether the wall can be seen from space or not has been a matter of controversy for many years.