The Chinese Great Wall

A small section of the Great Wall, as we had to experience it 60 km outside of Beijing.
The whole Great Wall is one of the seven wonders of the world of the modern era, with a total length of 21,196.18 km, is the largest and longest building in the world. Large sections of the wall are now permanently restored by state funding. This is located at Beijing and it is a 600 km long section, which is mostly in good condition.