The fishing port is the most authentic part of Mar del Plata — a working commercial harbour that has been here since the 1880s and that keeps the city economically grounded in something beyond tourism. The main pier is lined with seafood restaurants serving the freshest fish in the city; the boats at the dock deliver directly and the kitchens turn it around fast.
A colony of sea lions lives on the rocks and breakwaters at the port entrance and has done for decades, largely ignoring the fishing traffic. Walk down to the port from the beach resorts for the contrast alone: one kilometre separates the beach parasols of La Perla from the nets, forklift trucks, and fish smell of the working harbour.