The Three Bridges is the name given to a location that encompasses a complex of railway lines and bridges. One railway line runs alongside a canal and under a large stone viaduct. Two lines run atop the viaduct and under a steel bridge with a single track and roadway.
- To create the set, models used on previous sets were used, such as:
- A steel bridge is possibly a tramway as both engines and road vehicles run across it.
- Wooden Railway (as Mountain Tunnel, discontinued)