Green Mountain Cog Railway

The Green Mountain Cog Railway was a mountain railway built to carry tourists to the top of Green Mountain (now known as Cadillac Mountain) on Mount Desert Island in Maine. Its track was built to 4 ft 8 in (1,422 mm) gauge, which is technically a narrow gauge, as it is a 1⁄2-inch less than 4 ft 8+1⁄2 in (1,435 mm) standard gauge.