No trip to Chamonix should be complete without a visit to the legendary "Mer de Glace", the longest and arguably the most impressive glacier in the Chamonix valley. It is also the largest glacier in France.
The Mer de Glace (which translates to "Sea of Ice" in English) is 7 kilometres long and has a surface area in the region of 42km2. It extends from an altitude of 3900m at the point where the Leschaux, Le Tacul and the Talèfre glaciers converge, down to 1400m, just below the Terminal Neige Refuge. The width of the glacier varies between 700 metres and 1,950 metres and the depth of the ice averages around 200 metres, dropping down to around 80 metres near the ice cave.
It's an impressive place to visit in either summer or winter, and should definitely be on your 'to do' list on a visit to Chamonix.