One of Cuyutlan's attractions is it's Museo de la Sal - Salt Museum (sponsored by the University of Colima), which displays the processing involved in the extraction of sea salt and its history. Nearby along the train tracks there are many weathered wooden storage sheds that were used for warehousing the salt before shipping. During the Spanish colonialization of Mexico, Cuyutlan was one of the the major salt suppliers for the silver mines of Guanajuato and the area is still an important sea-salt producer today.

I was looking to buy some salt and this was the first time the Salt Museum was open.  They do sell salt at a reasonable price in 1, 2 and 4 kilo bags.  They have a number of miniature re-creations of the salt process and Spanish descriptions and history.  The salt farm below is along highway 200 on the way back to Manzanillo.