Places   (Help with places, streets and buildings in Wigan.)

Just a general question, and this is a long shot, but does anyone know a house which had a garden railway? I was told this by my grandma who seems to recall a house on Downall Green rd that had a railway running around; think it was a semi. Not sure exacty when, but I think this was maybe the 40s or 50s. I asked my dad who is quite familiar with the area, but he has no memory of it. Anyone know? Thanks