The Valdés Peninsula is a World Heritage Site, among other things because it welcomes the largest breeding population of southern right whales in the world. In addition, you can spot orcas, dolphins, sea lions, elephant seals, armadillos, penguins (of Magellan), cormorants, martinetas and a great variety of birds. The peninsula is huge and spectacular. You do not have time to see it all in one day! You can stay in the peninsula itself (the only population is Puerto Pirámides), or in Puerto Madryn, (outside and cheaper).