Climbing the ladders up to the Konkordia Hut. The hut was originally built in 1877 at a level of 50m above the Aletsch Glacier. Since then the glacier has since receded over 100m more, so over the years an elaborate series of metal staircases have been built downwards to scale the 150m (~500 ft) vertical cliff between the hut and the shrinking glacier!
As you hike up the staircase there are plaques along the way that mark where the glacier level used to be at certain dates in the past. Photo © copyright by Jack Brauer.