Train on mountain bridge, Filisur, Canton Graubunden, Switzerland

arch architecture bernina express bridge canton canton graubunden color image curving day environment express train filisur graubunden journey landscape landwaser viaduct mountain nature nobody on the move outdoors photography red remote rugged scenic view stone sunny switzerland train transportation travel travel destinations tunnel unesco world heritage site vertical viaduct alpine arc central europe central european color colour curvature curve daylight daytime europe european forbidding harsh mass transit mass transportation mountainous natural on the go outdoor outside peak public transit public transportation scenics severe sunlight sunshine swiss tough transit transport transporting traveling travelling trip vehicle winding