I think this would be the Great Wall of China!
although it's actually thought to be much, much longer: over 5000 miles long, if yoiu include natural defensive barriers used in it.
The towns are 8 kilometers apart because as you see 6 centimeters equal 2 of the 3 centimeters which means that you add four twice or times it by 2 to get 8
The journals were based upon the field diaries that explorers were required to keep by the Colonial Office. The explorers' field diaries and journals were also of vital importance for the information they contained about possible economic benefits that could be derived from the land.
