Montreal has the world's largest Catholic church, St. Joseph's Oratory, one of the world's most famous altars of worship. St. Joseph's Cathedral is magnificent, with a dome 97 meters tall, second only to St. Peter's Basilica in Rome. It is also the second largest domed cathedral in the world. Directly in front of the church is a giant square divided into three parts by green belt, the middle part is a pedestrian walkway, two lanes on both sides. Walk through the square and you can see a long column of steps leading directly to the church. This step is also built by the mountain, and it is also divided into three parts. The steps in the middle are for pilgrims to "kneel" up, and the ones on both sides are for tourists. Opening hours: Daily, 9:00-5:00 (Recommended Sunday, very spectacular drop) Tickets: free