Great Wall of China
The Great Wall of China (长城 Chángchéng) stretches westward across the provinces and municipalities of Liaoning, Hebei, Tianjin, Beijing, Inner Mongolia Autonomous Region, Shanxi, Shaanxi, and Ningxia Autonomous Region to Gansu in the west.
The Great Wall of China can be visited at many places along its length of several thousand kilometers. Its condition ranges from excellent to ruined, and ease of accessibility varies straightforward to quite difficult. Note that different sections also each have their own admission fees, e.g. if you want to hike from Jinshaling to Simatai then you probably have to pay twice.
The geography of Northern China ranges from mountainous in northeast Liaoning and Hebei provinces, through the grasslands of Ningxia, semi-arid desert of China's loess plateau, and borders the sand dunes of the Tengger desert of Inner Mongolia. It is the area around Hebei and Beijing that most people associate with the Great Wall, but most of the Great Wall lies in the desert regions of the country.
Flora and fauna
Chinese wildlife is diverse, considering all of the different habitats available along the length of the Great Wall. From the rare Siberian tiger in the northeast to the protected and rare Giant Panda which lives in southern Gansu, Sichuan, and Shaanxi, you never know what you might see on a given day.
Wild mammals can be found in the north, such as the Manchurian weasel, brown and black bears, northern pika, and mandarin vole. Deer species include Sitka deer, roe deer and the long-sought-after spotted deer, which has many uses in Chinese medicine.
The birds of the region include various pheasants, black grouse, pine grosbeak, various woodpeckers, mandarin duck, and the fairy pitta, a rare migratory bird. Cranes are especially revered in China. Common, demoiselle, white-napes, hooded, and red-crowned cranes all breed in China.
You can find many tonic plants along the Great Wall, such as the rare ginseng (Panax ginseng). Chinese medicine has had many thousands of years to discover and use these tonic plants for the benefit of mankind.
Northern China has all four seasons and they arrive with a vengeance. Summer and winter temperatures normally reach extremes of over 40 degrees Celsius (105+ °F) and -20 degrees Celsius (-4 °F) respectively.
Badaling Take bus 919 back to Beijing (¥12) or the train from either the Badaling or Qinglong Qiao stations (¥14). The last bus 919 leaves at 17:00. There are plenty trains going to Badaling station. Very cheap and super easy from Beijing station.
For other sections hopefully you've come with a tour that is picking you up from that section. Taxis back to Beijing can be quite expensive (even from Badaling, it will probably be over ¥100).
Ming Tombs Many tour operators or private drivers will combine the wall and the Ming Tombs in a day trip. The Ming Tombs are nothing special and are quite plain. Tourists usually skip them unless they are Chinese history buffs.