800 mm gauge railways
800 mm gauge railways are narrow-gauge railways built to a track gauge of.
Whilst this gauge is uncommon amongst adhesion railways, some of the world's best known rack railways are built to it. Six of these are in Switzerland, including the world's steepest rack line and the world's longest pure rack line, whilst the United Kingdom's only rack railway is also to this gauge. A few funicular railways are also built to this gauge.