Aponiente sits in an old 19th-century tide mill. The tide mill was built in 1815 to produce energy from the wave power generated by the four daily tides; these have influenced the landscape and the flora and fauna of the Bay of Cádiz since the dawn of time. The Caño Mill took cereals grown in the surrounding countryside of El Puerto and Jerez and turned them into food for the local people (flour for bakeries, biscuits and cakes), in addition to milling sea salt.
For 150 years the building was a benchmark in the flour industry in the Bay of Cádiz, and became one of the biggest tide mills in Southern Europe. It housed a much-needed industry in a unique location: the salt marsh.
After the mechanisation of the flour industry and the salt crisis of the 1970s, the building fell into disuse and was abandoned, along with the old San José salt mine, the Caño de la Madre Vieja del Guadalete and everything that surrounded it.