Pichilemu
Ross was very rich and based on his European background, he bought a 300-hectare piece of land and named it "La Posada" (), or Petren Fund, in 1885. Ross designed an urban place of high environmental value and landscape, turning "La Posada" into a hotel (Great Hotel Pichilemu, later Hotel Ross, or Ross Hotel), and building a casino, embankments, stone walls, a balcony facing the beach. Additionally, he built a park and a forest of more than 10 hectares. Agustín Ross turned Pichilemu into a summer resort town for the people from Santiago. Some of his buildings were named National Monuments.