Recognized by Unesco in 1988 as a World Heritage Site, it is actually the conjunction of three valleys (San Luis, Santa Rosa and Meyer) interconnected with each other in a large area that covers 270 k m2 of extension and where some facilities are preserved belonging to the nearly 70 sugar mills that existed in the area in the 18th and 19th centuries, when Cuba became the main sugar producer in the world.
Among the best preserved facilities are the Guachinango plantation house and the property of the Manaca Iznaga in which the family house, some slave barracks and the immense tower that, thanks to its bells, warned of the beginning and end of the working days, religious celebrations, and other events such as the escape of a slave from the plantation.
The so-called Iznaga Tower was for some time the highest architectural site on the island.