As your train layout grows, you can produce greater variety by adding hills and valleys to your flat expanse. For this, of course, your trains will need bridges to navigate the landscape. Model train bridges come in many sizes, prefabricated and in building kits, in wood, plastic, and steel. From simple spans to the amazing trestles that carried trains over mountain-country gaps and canyons, bridges and bridge-building materials can solve almost any topological problem you may encounter. The newest growth in model rail bridges reflects the increasing interest in garden (large-scale) railroading. Here, challenges come from the natural setting - getting you through the slopes and rises in your own yard (some garden railroaders even tackle natural water features). Whatever the scale or location of your railroad, adding bridges to your layout adds excitement.
