If we painted stripes on it, or just made the observers stand closer to it, it would appear bigger.
We need to obscure the view of it from far away to make this reality pronto.
Also we could use a complex series of mirrors.
Or put magnifying lenses around the perimeter.
Or only allow children to attend. Everything is bigger when you're a child. Apart from problems and crippling stress; that's bigger as an adult, I think. I don't really remember my childhood apart from everything being really big.