couple of hikers walking in the puertos de aliva, or aliva, in the central part of the picos de europa.

mountain hiking nature sunlight trekking cantabria wall chalet mountaineering sunny national natural wild tour tourism discover trip roof green landscape vacation adventure european exploration peak trek landmark park refuge house hike travel sky alpine hill high chain panorama road summer trail recreation scenic summit river grass lake valley aliva puertos de couple hiker cows meadow picos europa