The engine and coach of the world first cog railway, which climbs Mt. Washington in New Hampshire. Original image from Carol… https://www.rawpixel.com/image/3094236/free-photo-image-america-carol-highsmithFree Image from public domain licenseCog Railway in New Hampshire's White Mountains. Original image from Carol M. Highsmith’s America, Library of Congress… https://www.rawpixel.com/image/433910/free-photo-image-new-hampshire-train-transportation-railwayFree Image from public domain licenseMount Washington Cog Railway in Twin Mountain, New Hampshire. Original image from Carol M. Highsmith’s America… https://www.rawpixel.com/image/3090877/free-photo-image-new-hampshire-america-carol-highsmithFree Image from public domain licenseVintage rack railway engraving illustration https://www.rawpixel.com/image/561121/metal-bicycle-chainView licenseMount Washington Cog Railway, New Hampshire. Original image from Carol M. 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