National Geographic : 1956 Mar
301 Each Summer Aragon Shepherds Lead Their Flocks up into the Clouds These young herders sleep in caves used by men from a time beyond memory. Their Churro sheep, recently sheared, yield meat, milk, and a coarse fleece called "mattress wool." Autumn snows will drive the flock down to the lower valley. Much of the range is included in the National Park of Ordesa, which Spain created in 1918.