Mutianyu
Being there
This is a magnificent section that is as equally well restored as Badaling with greener surroundings. It is a lot less crowded than the Badaling section. But the hike is a bit more difficult than Badaling. Choose Mutianyu over Badaling for your introduction to the Great Wall if you don't mind the hike. There is also a fun theme park like toboggan ride (¥55)(see below). You get choose cable car or chairlift (¥120 round-trip) or walk up the foot path to get to the watchtowers. The more modern cable car takes you to watchtower #14 (more towards the north end and higher in elevation) while the chairlift brings you to watchtower #6. There is also a shuttle bus from the entrance complex up to the bottom of the cable car (¥15 round-trip).
The story
Mutianyu is a section of the Great Wall of China located in Huairou District within the city limits of Beijing 70 kilometers (43 mi) northeast of the center of the city. The Mutianyu section of the Great Wall is connected with Jiankou in the west and Lianhuachi in the east. As one of the best-preserved parts of the Great Wall, the Mutianyu section of the Great Wall used to serve as the northern barrier defending the capital and the imperial tombs.