This valley of the mills is a hidden little sight not to be missed if you are in the Square.
It looks particularly beautiful at night with the purple lighting.
Situated below street level you wouldn't even know it was there, unless you walked right past it, or knew to look out for it.
You can not go down, just view it from the street level.
I really enjoyed seeing it, as it was such a surprise to see this old mill close to such a lively square.