For unforgettable bird's-eye views of the cathedral interior from its upper storeys, and of the city from the cathedral roof, take the rooftop tour, which starts in the visitor reception centre. The tours are popular, so book beforehand, either at the visitor reception centre for same-day visits, or on the cathedral website up to several weeks ahead. Tours are given in Spanish, but some guides also speak some English.
The guides provide a good insight into Santiago's and the cathedral's history. From late October through March, the last tour is at 5pm.