Model railroads are miniature train systems that enthusiasts build and operate, often replicating real-life railroads. These setups can vary in size, from small tabletop layouts to expansive rooms filled with intricate tracks, landscapes, and buildings. Model railroads typically feature detailed scenery, including trees, mountains, and towns, creating a realistic environment for the trains to travel through. Many hobbyists use scales like HO or N to determine the size of their models, allowing for a range of detail and space requirements. Model railroads can also include electric trains, which are powered by electricity, and can be controlled remotely, adding to the fun and complexity of the hobby.