Not long after leaving Burgos and as we travelled north the landscape began to change. Only gradually at first and then more rapidly as we approached the snow capped Cantabrian Mountains.
The endless brown prairies of Castilla y León started to slowly give way to enclosed green fields of Cantabria and now there were ridges and escarpments each one playing host to a clutch of wind turbines. There was livestock in the fields as we began to climb, gently at first and then more dramatically into the mountains.
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