1) NaCl works 2) Where NaCl is made 
Saltern is a word with a number of differing (but interrelated) meanings. In English archaeology, a saltern is an area used for salt making, especially in the East Anglian fenlands. There is an area called Salterns in Poole, Dorset, which was in active use for salt-making from before 1750 to the mid-1800s. A 1748 map (held in Poole Library) shows ...
salt-works
• (n.) A building or place where salt is made by boiling or by evaporation; salt works.
Salt'ern noun A building or place where salt is made by boiling or by evaporation; salt works.