The Great Wall of China
There is hardly anyone on Earth who has never heard of the Great Wall of China. It is often cited as the only man-made structure on the planet that can be spotted from near space without the aid of optical instruments. Undoubtedly, it ranks among the most remarkable feats of engineering ever accomplished by humankind. Yet its construction was far from straightforward. In the following paragraphs, we will explore who built this monumental structure and the main reasons behind its creation.
