"Guidatour's professional guides have earned their excellent reputations, and the company's Old Montréal East and Old Montréal West itineraries both stop off at the must-see Notre-Dame Basilica, including an interior visit at no additional charge. Both tours last 90 minutes, and they're best for those looking for a crash course in the history of Montreal. You'll be amazed at how many hidden treasures you stumble upon in such a short time span. As much of Guidatour’s offerings are held outdoors, scheduled tours are generally on hold for the colder months. If you can brave the cold, however, feel free to reach out directly through their website to inquire about setting up a private tour." - Todd Plummer