There are many parts of the Great Wall, built over a thousand years, as the map below shows. There are several restored sections accessible from Beijing and we visited Mutianyu based on some logic and some intuition, and we were lucky.
Popular tourist sites can be flooded with thousands of Chinese tourists, we saw very few western travellers in our week's stay. So trying to avoid the crowds is important, unless you enjoy thst sort of thing.
Blessed with a blue sky horizon to horizon and a hint of winter in the air we set off for the Mutianyu section of the Great Wall in our taxi for a day organised by Lihua. The Great Wall has various discrete, restored and tickets sections open to the public and this section would not be too busy, we guessed, as it is a little further from the city centre.
After a 90 minute drive along a highway and with scenery and adjacent development which would not have looked out of place in the USA we arrived in time for more excellent coffee and a snack to fuel our ascent. It was spectacular, I can add nothing to the photos.