The convention, at North American O Scale shows, is for a large gathering to include layout tours, meaning the owners of the layouts make their home layouts available for public viewing. Like this.
That's a continuous track, for showcasing the British or Soviet models, or perhaps there will be an extra-long North American train placed up there just to show off. You get a view of the installed parts of the North American layout, including the staging tracks and the steel works, as we pan around. Enjoy.