Not scary when you walk round it, mind you that takes about 20 minutes. LOL
River Caves is scarier, to walk round that is. Squeezing through wall gaps, walking through dark passages full of pipework and trying not to slip on boards placed across the water channel.. eerie and fun. Not that many people experience that other than during a rare breakdown or organised tour..
I can see Goldmine being scary to kids, certainly. It's a "nightmare" to evacuate according to managers, atleast!