Once judged the third largest church in the world after Saint Peter's in Rome and Saint Paul's in London, this is now the largest church in the world by volume. The 15th-century cathedral occupies the site of the former great mosque built in the late twelfth century. The central nave rises to an awesome 37 m over a total area of 11,520 m². The cathedral is the final resting place of the remains of Christopher Columbus. Buy tickets at the nearby Church of Salvador (Iglesia del Salvador), where you can buy the tickets for Salvador and Cathedral+Giralda. You will save yourself the long queues and visit another amazing church.