Solikamsk on the Usolka River in the Urals has been celebrated for the production of salt since the discovery of large deposits early in the fifteenth century. It grew into a large city in the seventeenth century by taking advantage of its position on the Bubnov Road, the only route from Europe into Siberia. The city’s late seventeenth century cathedral is witness to its past prosperity. Some 11,000 people in the region are employed in producing potassium chloride, used as a fertiliser, and the area’s sink holes caused by subsidence where salt has been extracted underground are notorious. The museum of the history of salt making includes images and artefacts relating to wooden brine-pumping towers, salt chests, boiling pans for salt, salt warehouses and bath houses, with the associated buildings such as smithies that were necessary for the continued operation of the industry.