trees and mixed forests over the lake lucerne or vierwaldstaetersee lake vierwaldstattersee and alpnachersee lake, alpnach

above alpnach alpnachersee background beautiful botanical branch canton colorful coniferous day deciduous diet earth eco ecological ecology environment evergreen flora foliage forest forests fresh grass green ingredient lake landscape leaves lucerne mixed mountain natural nature nobody obwalden outdoor outdoors park pattern pine plant rustic scenery scenic season spring switzerland tranquil travel tree trees trunk trunks vierwaldstaetersee vierwaldstattersee view wild wood woods