Places   (Help with places, streets and buildings in Wigan.)

Seems like noone knows for certain what it was. I have heard about it being from airraid shelter, whether that's true or not I don't know, I used to hear that when I was young. Not sure about houses though, if there were houses there you'd think there would be more trace of it, and why clear the houses leaving and leave that wall as it was?. I assume old maps would show those houses, if indeed there were houses there.