Helicopter in flight near Walensee, Weesen, Switzerland, with a backdrop of lush, early spring forests on mountain slopes

helicopter walensee weesen switzerland flight aerial forest mountains spring transport aviation rescue scenic outdoors nature alpine greenery landscape operation flying rotorcraft aerial view wilderness remote machinery technology mobility air transport blue sky adventure safety emergency services travel tourism environmental high altitude rotor blades air vehicle wooded rugged terrain conservation area swiss alps european landscape panoramic view valley recreational helicopter flight wilderness exploration forested slopes