wild nature of wachau valley (unesco) with boat on danube river near the spitz village in lower austria,

summer durnstein spitz vienna unesco world heritage site mountain tourism ferdinandwarte krems blue lower village water weissenkirchen wachau valley drone panorama aerial wine cruise foliage transport sky austria europe aggstein vineyard river landscape town duernstein austrian donau grapevine boat viewpoint castle forest panoramic church vine danube fall transportation ship plant wild nature famous