The map above shows how many times the population (not area) of Scotland could fit into England. In case you have difficulty reading the numbering above, the answer is 10.
The Scottish Watershed separates the drainage and river systems that flow east into the North Sea from those that flow west into the Atlantic. The map above shows its route from the English Border to the North of Scotland at Duncansby Head (near the more famous John O’ Groats).
Or, as Peter Wright (one of the only people to have walked it) puts it: