Salt Eyes

So as the weather has turned and wasn't greatly outdoor weather we decided to visit Lion Salt Works over in Northwich. Not really sure what to expect but for a small'ish museum it was packed full on information. I never knew salt was a currency and all the different types of salts there are.
This picture is of one of the salt bins but it has a face about it that caught my attention.
If you've not been, it's worth a visit!