Since pre-Roman times, the Gulf of Cádiz has been a center for Almadraba tuna fishing, in accordance with a technique that has barely changed since then. To oversee exploitation in the waters of the mouth of the river Piedras, from 1929 to 1963 there existed a complex called the Real de la Almadraba de Nueva Umbría, inhabited by fishermen on a seasonal basis. After decades of abandonment, a first effort to put the premises to good use once again – and highlight their importance – has involved refurbishing some of the industrial elements as well as the old pier, the remains of which are harnessed for a parapet of cyclopean concrete and a grooved pavement.