majestic fletschhorn 3996m above tälli glacier in saas-grund

2400m 3206m 3996m alpine alpinism alps bed cablecar center change climate climbing cloud crack crevasse danger deformation effect erosion fletschhorn flow glacier global goes greenhouse hiking hohsaas holidays ice jegihorn july kreuzboden majestic mass medium meltwater moraine mountain mountains nature peak pennine range receding resort risky rock saasgrund saasgruund shear shine shot sky spielboden sport station summer sunny swiss switzerland temperature that tourism valais wallis warming