A tunnel is a superb scenic feature for making the eye believe the miniature world is much bigger than it actually is. A tunnel can hide the train for a brief period of time, enabling the eye to imagine that the train has left the vicinity for a destination further away. The point where the train reappears from the other end of the tunnel, it is possible to imagine that the training exiting the tunnel is a completely different train arriving from another location. Let your imagination run wild!

Downloadable plans for tunnel portal. Make them to OO gauge, N scale or HO scale. https://www.modelbuildings.org/walls-tunnels-bridges/