A stunning visualization demonstrates the vast size of China's most famous ancient structure. The length of the Great Wall would be long enough to encircle the entire western part of Europe, from Greece to Denmark. It would span across the Adriatic, circle Italy, bypass France, Spain, and Portugal, skirt along La Manche, and finally end its path somewhere in western Denmark.

Moreover, the Great Wall's length could fully enclose Sicily, Sardinia, and Corsica within its walls.