Begin the tour at the Nativity Facade. Observe the scenes with natural elements such as plants, animals, and associated symbols. Visit the model showing the intended design for the completed Sagrada Familia to see the artist's vision. Proceed inside and notice the tall columns designed to resemble trees, with light from stained-glass windows casting patterns of colors across the space. Step outside to view the Passion Facade, which contrasts with the Nativity Facade by using a stark style with expressive sculptures depicting significant events. Conclude the visit in the Sagrada Familia Museum to see original materials, including models, sketches, and photographs, which provide insights into the architecture's development.