A friend and I will be working in Lausanne for a month, 9-5, Monday-Friday. We will have four weekends that we can use for travel starting the weekend of July 24/25. Where would you suggest we go? We would leave early Saturday mornings and return Sunday evenings. If we needed to, we could leave around sunset Friday evening. Hopefully we'll be able to explore places closer to Lausanne during the week, places like Montreux, Vevey, etc. My friend has mentioned wanting to see the Berner Oberland. I've been to Zermatt by chance a couple times so would prefer other destinations. We are enthusiastic travelers, older rather than younger, interested in most everything, and physically fit but we don't climb mountains or hike.
What can you suggest?