viaduct in davos monstein. landwasser river flows through the canyon. hike along the river in the valley to filisur. old

landscape architecture bridge travel viaduct green arches transport aerial blue road way tourism nature historic grass europe background view transportation railroad sky highway urban steam stone summer train day railway outdoors hill country monstein landwasser davos klosters zugerschlucht wiesen filisur engadin grion graubunden swiss switzerland mountains old journey outdoor