John, there are layouts with tracks that go nowhere to simulate another part of the train universe. Usually they go toward a wall with a craftily painted mural of a train coming in or just tracks leading off into the sunset. I've even seen one where they cut the front off a broken engine and attached it to the wall like you would a faux building front (relief). In your case, you don't have a wall on the end, but you could add a removable panel on which to paint such a scene. The panel could be attached like rails on a pickup truck. I would also add a removable panel under the bridge over the entry like in the photo.
