We visited when I was a kid in the late 90’s, I’d have been around 9 so I could be completely wrong about the location but I THINK it could be in Lincolnshire or North Lincolnshire. From what I can remember, it was a big colourful building, set back from the road because it had parking out the front. And in front of the building were these massive, colourful sculptures, like those ugly head totem pole type things. They were huge, as tall as the building! I think there were 3-4 of them? And inside the building it was one of those places where the rooms just seemed to go on forever, it was a total maze.
There would’ve been two people able to tell me where this was but unfortunately one is dead and I no longer speak to the other so I’m trying to rely on the power of the internet to try and help me find it 😅 It’s been driving me nuts for ages!