Although located next to the Bay of Biscay and therefore frequently covered in mists or rain, the higher elevations of Picos de Europa has limited surface water and relatively few plants. As a limestone mountain the rock is water soluble and with time underground drainage systems develops to which surface water quickly infiltrates.
Picu Urriello is a bit over 2500 meters high. Most plants below are pictured at altitudes between 1500-2000 meter. Early July was a good time to visit as a lot of plants were flowering.