I came across this article while I was searching for something else. It relates to the the former Duke Energy layout now permanently at the Cincy Union Station. It appears to be O Gauge, outside third rail. It used to be a Holiday Tradition when it was at the Duke Energy (former CG&E) building. It is very Cincinnati - specific as to buildings and topography. The video in the article is short but well-done, focusing, as it does, on a peripheral track-level view of the layout. I recall visiting this layout many years ago; I need to do it again. Enjoy!
http://queencitydiscovery.blog...al-theres-whole.html
Further information here:
http://www.cincymuseum.org/hol...nergy-holiday-trains