wachau valley with green vineyards in spitz village above danube river, lower austria, austria

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