I don't expect this glacier to be visible anymore from Montenvers train station/lookout during our lifetimes. The glacier in the visible part is almost flat, me

I don't expect this glacier to be visible anymore from Montenvers train station/lookout during our lifetimes. The glacier in the visible part is almost flat, meaning even 5km up the valley its still below 2000m altitude - that's becoming a death zone for glaciers. Really, if anybody is into mountains and admiring those alpine terrains, enjoy them now while you can. In maybe 30 years, the only place to admire them in Chamonix area will be from Aiguille du Midi, sitting 3800m high on top of a rocky needle. I expect other high-altitude european easy-to-reach places like Zermatt and Eiger will be in same or even worse state due to nature of the terrain there.