lac bleu in arolla, switzerland at the bottom of the val d'hérens in autumn season

aerial afternoon alp alpine alps arolla autumn beautiful blue drone environment europe european evolene fall foliage forest hill hills gouille lac bleu lake landscape location mount mountain mountains natural nature outdoor outdoors outside park place pond pretty scene scenery scenic season seasonal swiss switzerland tourism travel trees val 039 herens valais view water bottom 39aph39 hapound acopy rens