Golfo Nuevo is a large, sheltered natural bay on the Atlantic coast of Chubut Province in Argentine Patagonia. The bay is a key feature of the Península Valdés UNESCO World Heritage Site, known for its calm, protected waters that contrast with the rough South Atlantic outside. The city of Puerto Madryn sits on its northern shore, serving as the primary hub for anglers and marine activities. The bay's extensive shoreline includes rocky cliffs, shallow bays, sandy and pebble beaches, and coastal lagoons, creating diverse habitats for a rich array of marine life. Its status as a critical breeding and calving ground for Southern Right Whales underscores its ecological importance and shapes the seasonal rhythm of the region.