Saint-Jean-sur-Richelieu:

1. Fort Saint-Jean: A historic site featuring a museum and beautiful grounds, offering insights into the region's military history.

2. Richelieu River: A scenic river that offers opportunities for boating, fishing, and picnicking.

3. Canadian Railway Museum (Exporail): Located nearby, it's one of the largest railway museums in Canada, showcasing the country's railroad history.

4. L'International de montgolfières de Saint-Jean-sur-Richelieu: An annual hot air balloon festival, one of the largest of its kind in the world.

5. Old Saint-Jean: A charming area with historic buildings, boutiques, and cafes, perfect for a leisurely stroll.

Saint-Hyacinthe:

1. Château de Saint-Hyacinthe: A historic mansion turned cultural center, often hosting art exhibitions and events.

2. Cathedral of Saint-Hyacinthe: An impressive Neo-Gothic style cathedral known for its stunning architecture and religious significance.

3. Les Galeries St-Hyacinthe: A popular shopping center with a variety of shops, restaurants, and entertainment options.

4. Maison Daniel Johnson: The former residence of Quebec's Premier, now a museum dedicated to the history of the region.

5. Parc Casimir-Dessaules: A lovely park offering walking trails, green spaces, and a peaceful atmosphere.

Other Outlying Districts (General Area):

1. Mont Saint-Bruno: While not in the immediate vicinity, Mont Saint-Bruno Provincial Park is a beautiful natural area with hiking trails and scenic views.

2. Rougemont: Known for its apple orchards and cideries, offering a taste of the region's agricultural heritage.

3. Verger Au Coeur de la Pomme: An apple orchard where visitors can pick their own apples and enjoy fresh, local products.

4. Canal de Chambly: A historic canal offering picturesque walking and biking paths along its banks.

5. Yamaska National Park: A bit further out, this park offers outdoor activities like hiking, kayaking, and camping, set amidst stunning natural landscapes.