switzerland mountain mountaineer europe mountain climbing alps mountains swiss alps mountaineering european eurasia 1910s alpinism alpine climbing 1900s mountain guide alpinist alpinismo alpen alpes 20th century alpinisme eurasian alps drama mountain climber mountainclimbing mountains alpi schweiz alpine shot on film alps mountains range feature length alps mountain range early 20th century alpinismus 1918 jungfraujoch northern hemisphere 1917