Visit Estancia 25 de Mayo, a sprawling 42,000-acre (17,000-hectare) ranch with a historical main house outside El Calafate. Traveling in a comfortable 4×4 vehicle, ascend the Huyliche and Calafate hills. Destination: an outpost of the Villalba family residences—the first inhabitants of this land. Learn about the family’s history and the native flora and fauna, then enjoy a typical Argentinian lunch.