Rail transport in the Isle of Man
The Isle of Man has a rich transport heritage and boasts the largest narrow-gauge railway network in the British Isles with several historic railways and tramways still in operation. These operate largely to what is known as "Manx Standard Gauge" (3 ft [914 mm] narrow gauge) and together they comprise about 65 miles (105 km) of Victorian railways and tramways.
Source: Wikipedia — Rail transport in the Isle of Man (CC BY-SA 4.0)