passenger train through landwasser viaduct in the swiss alps, landwasserviadukt, rhatische bahn, mountain background

graubunden switzerland alps grison wef davosklosters schweiz davos landwassertal viaduct travel nature railway bridge mountain architecture transport train outdoor railroad landscape summer glacier sky attraction filisur landwasserviadukt swiss famous rail vacation panorama amazing nice arch destination forest landwasser express structure scene tourist building countryside landmark tourism albula bernina rhb