Basilica of Notre Dame
Without fear of contradiction, I can say that this is one of the most beautiful cathedrals I've seen in my life. To get to it you have to be willing: the cathedral is at the top of a hill. There are buses that go up but we preferred to climb up by foot. It was worth it. The neo-Byzantine cathedral is crowned by a statue of the Virgin Mary which is visible from any point of the city. That virgin is 11 meters high, which when you see from below seems little, but it is not ... It's huge! And that´s just the outside of it! From inside you can see gorgeous gold and red colors. Entrance is free, and I would say that you pay just with the climb you need to make.