I was at a train show today and saw a Woodland Scenics BR5064 Rustic Water tower in HO scale and was surprised how well it appeared to fit in with our 1:64 scale structures. The reason is the O scale version is GIGANTIC so the HO scale version looks good for "S".
There is a small shed included with the model but just don't use it and you have a good sized model. It's about 10" tall so it's about 54 feet tall in "S".
It's very pricey ($115 MSRP) but very well done. If I had the dough and a space for it I'd get it. I have neither so....