If you want to see the world's largest ball of twine, you go to its owner, the Cawker City (Kansas) Community Club. Likewise, if you want to see the biggest salt mine in the world, you go to its owner, North American Salt. The company, which is a subsidiary of Compass Minerals International, manufactures a variety of salts, including agricultural, food, and industrial grades. North American Salt has production and mining sites in the US and Canada, including the largest global salt mine, which is located in Goderich, Ontario.