The terraced vineyards of Lavaux are worth a visit. The area is protected by UNESCO and lies between Lausanne and Montreux.
You can rent a bike or stroll along to explore the terraced vineyards. You can see how they operate using solar energy, thermal power and radiation. You could also opt for a tour or help out a winemaker as he goes about his daily job. Needless to say, wine tasting is also available here.