All these three parts are of the most famous parts of China Great Wall. Each of them boasts their spectacular features. Badaling part has been restored and has been well protected. It is the most well-known and most popular part of the whole great wall. Just because of its popularity, it is always crowded with visitors. While Jinshanling and Simatai great wall reserves its original appearance without any restoration, so this part is more shabby and broken and with some danger to visit it. This section is the most favorite part of great wall for hikers all over the world. Jinshanling and Simatai require you to be more energetic than Badaling section.

Yes, I can not agree more with Delia. It is stimulate hiking from Simatai to Jinshanling, some part of the wall is a bit dangerous, it is not suitable for elder people. Mutianyu section is also very beautiful.