We will be coming from Aosta, Italy, heading for Sion, by either bus or train. We are also looking at taking a detour through Chamonix, France. Has anyone done this? Is it worth an extra day or two? Our trip is mostly about just enjoying the European experience -- scenery, food, a few short hikes or bike rides, culture.
From Sion we need to get to the Lauterbrunnen area, and I understand there is a tunnel that goes from the Rhone Valley under the mountains to the Bernese Oberland (Kandersteg) . Is this a good way to go? Are there buses or trains that go through here?