Railway modelling or model railroading is a hobby in which rail transport systems are modelled at a reduced scale.
HO scale (1:87) model of a North American center cab switcher shown with a pencil for size
Z scale (1:220) scene of a 2-6-0 steam locomotive being turned. A scratch-built Russell snow plow is parked on a stub (Val Ease Central Railroad).
A simple H0 (1:87) scale model railroad, consisting of three interconnected modules, each 70 x 100 cm in size. It has two concentric ovals of track and a few switches to sidetracks. It makes no pretension of being a copy of "real life". Using low-cost landscaping parts, house kits and rolling stock, it was built for a total of only a few hundred dollars.
A ridable miniature railway is a large scale, usually ground-level railway that hauls passengers using locomotives that are often models of full-sized railway locomotives.
Delicias station in Madrid, Spain
This is a Small Locomotive. Thought to be the oldest surviving 10¼" 'Garden Railway' Locomotive in the world. Built in Birmingham, 1900, by Grimshaw for Capt. Holder's Pitmaston Moor Green Railway.
Miniature railway ride in West Ryde, Australia in 2007
Wells and Walsingham Light Railway