From the late 18th to the late 19th century, the Valle de los Ingenios (Valley of the Sugar Mills) was a center of sugar production in our mystery country. At the peak of the industry, over fifty cane sugar mills were in operation, with over 30,000 slaves working in the mills and the sugar cane plantations that surrounded them.

Can you name that country? 
See below for answers.

This mystery country is Cuba.
Click to see Cuba tours.