Montreal is a vibrant city with many things to do and see. Here are some of the top attractions and activities in Montreal according to the search results:

1. Old Montreal (Vieux-Montréal): This historic district is a must-visit for its charming cobblestone streets, architecture, and restaurants1.
2. Mount Royal Park: This park is a popular destination for hiking, picnicking, and enjoying the views of the city23.
3. Notre-Dame Basilica: This stunning basilica is a must-see for its intricate architecture and beautiful stained glass windows4.
4. Montreal Botanical Garden: This garden is home to a wide variety of plants and flowers, as well as several themed gardens1.
5. Montreal Museum of Fine Arts: This museum features an extensive collection of art from around the world, including works by Canadian artists4.
6. St. Joseph’s Oratory of Mount Royal: This basilica is one of the largest in the world and is known for its beautiful architecture and stunning views of the city4.
7. Time Out Market Montréal: This culinary and cultural destination is a 40,000-square-foot space with a wide variety of eateries, bars, a cooking school, and cultural events2.
8. Montreal bike tour: A bike tour is a great way to explore the city and see its many attractions5.
9. The Underground City: This network of interconnected tunnels and shopping centers is a unique feature of Montreal and a great place to explore on a rainy day4.
10. Sainte-Catherine’s Street: This street is a major shopping and dining destination in Montreal, with many restaurants, shops, and entertainment venues4.