mountaineering signposts and markings by lake lungernsee and on the slopes of the hills around the lungern lake

mountaineering switzerland information orientation signposting lungernsee crossroads indication misfortune prevention recreation signposts reservoir direction indicator landscape mountains undefined markings obwalden alpinism crossing distance indicate mountain signpost trekking natural lungern schweiz fitness outdoor signage tourism warning slopes alpine canton kanton obwald active arrows forest hiking injury nature safety signal symbol travel hills arrow stone stray trail woods lake alps hike lose mark path rock sign wood fit log