Gaudí also practiced landscaping, often in urban settings. He aimed to place his works in the most appropriate natural and architectural surroundings by studying the location of his constructions thoroughly and trying to naturally integrate them into those surroundings. For this purpose, he often used the material that was most common in the nearby environment, such as the slate of Bellesguard and the grey Bierzo granite in the Episcopal Palace, Astorga. Many of his projects were gardens, such as the Güell Park and the Can Artigas Gardens, or incorporated gardens, as in the Casa Vicens or the Güell Pavilions. Gaudí's harmonious approach to landscaping is exemplified at the First Mystery of the Glory of the Rosary at Montserrat, where the architectural framework is nature itself—here the Montserrat rock—nature encircles the group of sculptures that adorned the path to the Holy Cave.