There's a very large layout in a building next to JRW's Saga Arashiyama station where D51 1 is on static display. Amongst many interesting sights and activities are the cabs of EF66 59 and EF66 54, which have their controls tied into the layout; visitors can then drive one of the models. This video is by YT uploader shuuuji.
http://www.youtube.com/watch?v=0-IlVmTKvb4
http://www.sagano-kanko.co.jp/dioramakj/