Historically much salt has been mined (and brine pumped) from under Mid-Cheshire. This has caused subsidence and many older buildings are built on frames to prevent damage. There is a Salt Museum in Northwich. | Historically much salt has been mined (and brine pumped) from under Mid-Cheshire. This has caused subsidence and many older buildings are built on frames to prevent damage. There is a Salt Museum in Northwich. |