From an Atlas Obscura online article:
As it leaves Durango, the train’s multiple-chime steam whistle can be heard reverberating throughout the town and along the Animas Valley. As it proceeds north, the train winds alongside the Animas River as it traverses the verdant green pastures of the Animas Valley and then crosses through the spectacular and breathtaking San Juan National Forest. The remote and treacherous route through the mountains includes a dramatic and stomach-churning stretch along the edge of a narrow shelf carved into the sheer granite cliffs 400 feet above the river.
As one of the United States’s most scenic historic railroads, the Durango & Silverton Narrow Gauge Railroad (D&SNG), with its jet-black steam-powered locomotives and 1880s-era coaches, travels along the same tracks that miners, frontiersmen, and cowboys journeyed nearly 140 years ago.
To read more click on following link: https://www.atlasobscura.com/places/durango-silverton-narrow-gauge-railroad?utm_source=Atlas+Obscura+Daily+Newsletter&utm_campaign=d5355b27d3-EMAIL_CAMPAIGN_2019_07_25&utm_medium=email&utm_term=0_f36db9c480-d5355b27d3-63029309&ct=t(EMAIL_CAMPAIGN_07_25_2019)&mc_cid=d5355b27d3&mc_eid=9baf474570