This full day excursion in the steppe zone aims at all people who enjoy outdoor activities and adventure, ready to discover new places. The tour includes approximately 3 hours walking on discontinuous ground where wind and water were responsible for uncovering this place, which remained hidden for millions of years. Departure from El Calafate by Route 40, where we can see Argentino Lake, Santa Cruz and La Leona Rivers, a panoramic view of the majestic Andes mountains and Fitz Roy Mount. We will stop for about 15 minutes in La Leona hotel (historical site) and continue traveling along the southern shore of Viedma Lake to reach Cerro Los Hornos slopes (Estancia Santa Teresita). We will look for the first time the great depression of the land where the petrified logs are situated and will start our trekking exploration of fossils, which lasts about 3 hours, including the time for lunch. Throughout the walk we will see lots of petrified logs lying on the surface, some with a 1.2 meters diameter, testimony that during ancient times the climate was very different from today and allowed the existence of a full forest. There have also been uncovered fossils of different types of dinosaurs. This land is sheltered from the wind because it is a natural depression in the ground. This steppe area, therefore, is very dry and weather conditions are generally very nice. After the walk, we begin the journey back to El Calafate on the same path with another stop at La Leona hotel.