The Valdés peninsula is a coastal accident on the Argentine sea, in the province of Chubut, Argentina. It is currently part of the nine World Heritage Sites declared by Unesco in Argentina. It is a reserve of the patagonian nature, it is known for marine animals, specially because it receives the largest breeding population of southern whales (Ballena Franca Austral), with more than 2000 specimens cataloged by the Whale Conservation Institute and the Ocean Alliance. The region contains sic nature reserves, and is considered oneof the main and most important whale watching destinations on the earth, particularly around Puerto Pirámides (which was onces a salt mining port) and the city of Puerto Madryn. In addition, killer whales, tonina dolphins, penguins, sea elephants and a variety of birds are seen there.