A narrow-gauge railway is a railway with a track gauge narrower than 1,435 mm standard gauge. Most narrow-gauge railways are between 600 mm and 1,067 mm.
1556 woodcut from De re metallica, showing a narrow-gauge railway in a mine
An Electric Tilt Train in Queensland. Unlike other states in Australia which use different gauges, Queensland's network is made up of 3 ft 6 in (1,067 mm)-gauge track.
The 3 ft (914 mm) gauge Disneyland Railroad in California
The 1 ft 11+1⁄2 in (597 mm) gauge Ffestiniog Railway in Wales
2 ft and 600 mm gauge railways
Two foot and 600 mm gauge railways are narrow gauge railways with track gauges of 2 ft and 600 mm, respectively. Railways with similar, less common track gauges, such as 1 ft 11+3⁄4 in and 1 ft 11+1⁄2 in, are grouped with 2 ft and 600 mm gauge railways.
A BL 9.2-inch howitzer with shells lined up on the ground recently delivered from the trench railway in the foreground during World War I.
The Chemins de fer du Calvados' Caen station in France.
A steam outline Schöma diesel locomotive on the Pelion railway in Greece.
The Groudle Glen Railway Sea Lion locomotive c. 1910 on the Isle of Man.