Gaudí had a deep appreciation for his native land and great pride in his Mediterranean heritage for his art. He believed Mediterranean people to be endowed with creativity, originality and an innate sense for art and design. Gaudí reportedly described this distinction by stating, "We own the image. Fantasy comes from the ghosts. Fantasy is what people in the North own. We are concrete. The image comes from the Mediterranean. Orestes knows his way, where Hamlet is torn apart by his doubts. " Time spent outdoors, particularly during summer stays in the Gaudí family home Mas de la Calderera, afforded Gaudí the opportunity to study nature. Gaudí's enjoyment of the natural world led him to join the Centre Excursionista de Catalunya in 1879 at the age of 27. The organisation arranged expeditions to explore Catalonia and southern France, often riding on horseback or walking ten kilometres a day.