From early June to December, Peninsula Valdes attracts thousands to witness a spectacular natural phenomenon. This peninsula is included in the UNESCO World Heritage List, primarily for its unique and rich fauna.
In the Gulf of Nuevo (Golfo Nuevo), separating the peninsula from the mainland of Patagonia to the south, you can find white southern right whales. Other species of marine mammals swim here for reproduction since the water in the bay is warmer and calmer than in the open ocean.
Southern right whales are the most famous local "landmark" whose length can reach 14 meters and can weigh up to 50 tonnes. Puerto Piramides is the only settlement of the Peninsula Valdes Nature Reserve. Golfo Nuevo can be explored from Puerto Madryn as well. There are daily whale watching tours. As whales are in the area to breed in June–December, they can be seen very close to the beach or from the boats.