Puerto Madryn is the starting point in order to visit many interesting sites that are unique in the world, some of them declared World Heritage Sites by UNESCO: First of all the Valdes Peninsula where you can join the boat excursions that enable whale watching. It is a privileged bird and sea fauna reservation, whose peak attraction is the Southern Whale that every year between May and December comes to these coasts in order to breed. The Valdes Peninsula is a geographical accident resembling an island and attached to the continent by a narrow part which is only 35 Km. wide, named Istmo (isthmus) Ameghino.