St. Joseph's Oratory is quite a sight to see in person. It's massive and spectacular. The best place I truly enjoy here is the hallway with lit candles. The many crutches hanging on both sides of this hallway has some significant meaning, The views of Montreal from the upper levels is amazing and a great photo opportunity.
The downside of this place is that over the years with so much popularity, it has become more commercialized and seem to capitalize on visitors for money. But this is a religious free location and everyone is welcome to visit.