The Mer de Glace (Sea of Ice) glacier can be reached through the Montenvers train. This glacier is located on the northern slopes of the Mont Blanc massif and is deemed the longest glacier in France at 7 Km long and 200m deep. Its speed is about 90 meters per year. This was easily visible from Chamonix at one point of time but it has been receding and is now not visible.
The Montenvers Railway commenced in 1908. It makes its way along the Aiguilles de Chamonix. The Montenvers station has restaurant, café and restrooms. One can see the Mer de Glace, Les Drus (Aiguille du dru), the Aiguille du Grepon and the Les Grands Jorasses from here. A cable car leads right to the ice grotto (ice cave).
But this is a tourist spot and the glacier attracts a large number of visitors. It has viewing platforms and also very small incongruous museum on its indigenous animals and birds and another on crystals.
Below: The Mer de Glace or “Sea of Ice”. The shrinking of the glacier is more than evident.
Around the Mer de Glace glacier. The Les Grands Jorasses can be seen in the farther end.
The museum with stuffed animals –