That may be because ground scales aren't always the same as figure scales, and having correctly-scaled scenery just doesn't work sometimes. You end up with barns half a mile long. Or it may be something else, that is more a thing with buildings, I suppose.
But I have some toy baobabs, and as far as I can tell they are perfectly suitable for 28mm figures (I mean, those things are massive), but when you put them on the tabletop they somehow look wrong. Just too big.
Lovely work there, Kingscarbine.