petrechema river, beech forest of gamueta, valles occidentales natural park, spain

air aragon beautiful beauty beech biodiversity biology biotope calm conservation cute ecology ecosystem ecotourism environment europe flowing forest free fresh gamueta green habitat healthy huesca jacetania landscape linza mountain natural nature observation outdoor park petrechema plant pyrenees relax reserve river rock sanctuary scenery scenic spain stone stream tourism travel tree trek trekking valley vegetation view wild wildland wildlife wood woodland