Fun fact: In medieval Spain, because of the constant wars between Christian and Muslim kingdoms a lot of land count not have been used for farming. Big chunks of land would pass from one side to another, people would have to move and abandon their crops. This lead to rise of big sheep herding industry - sheep could be moved out of the way of incoming army. But the hot climate forced people to move the sheep into to mountains during summers. This migrations - summers in mountains and winters in warmer southern regions - created high quality product - merino wool. To protect growing wool industry special laws were enacted that created protected herding routes that in many places can be seen to this day:

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To celebrate this heritage there’s a “herding day” held in Madrid when sheep and goats from the mountains of Leon pass through the capital on their way to the winter grazing sites:

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