cavallers reservoir surrounded by high mountains , river noguera de tor in ribagorza, boi valley, in the lleida pyrenees,

alpine artificial blue boi canyon catalonia cavallers climbing cloudy cold concrete dam green high hike lake landscape lerida lleida mountain mountainous national natural nature nobody outdoors panorama park peaceful peak pyrenees reflected reflection reflex reservoir resource ribagorza river scenery serenity spain spanish taull trail travel trek trekking vacation vertical water