where is the world's largest salt mine
Sifto Salt Mine in Goderich, Ontario, which, at 1.5 miles (2.4 km) wide and 2 miles (3.2 km) long, is one of the largest salt mines in the world extending 7 km 2 (2.7 sq mi) . England. The  -wich towns  of Cheshire and Worcestershire.