The Valdes Peninsula (Spanish Península Valdés) is a peninsula along the Atlantic coast in the Viedma Department in the north east of Chubut Province, Argentina. Its size is about 3625 km². The nearest large town is Puerto Madryn. Most of the peninsula is barren land with some salt lakes. The largest of these lakes is at an elevation of about 40 m below sea level, until recently thought to be t…