This beautiful Basilica is located between Victoria Square and the old Port district of Montreal. It is absolutely spectacular and well worth the $10 entry fee.
It is meticulously kept and features some very interesting, intricate architecture, murals, statues and all sorts of other wonderful, spiritual artifacts. The fuse of wood and stone is very impressive and the lighting is absolutely incredible and makes for some amazing photography. I had an absolute blast snapping tens of pictures with my camera. You can probably even pull off some impressive HDR pictures if you have a tripod.
They offer tours during the day and at night. The night ones feature a light show from what I've heard but I wasn't able to make it to them sadly enough, but will try to on my next visit to the city.
Whether you are here for religious reasons, or to visit, this Basilica is very fitting to its neighborhood and is a must-see piece of local history.