schaefler altenalptuerme mountain ridge swiss alpstein alpine appenzell innerrhoden switzerland, a steep ridge of the

alps mountains mountain landscape swiss tourist alpine alpstein appenzell cliff climb ebenalp edge europe formation hike hiking innerrhoden mountainside outdoor panorama path peak range ridge rock schaefler sightseeing steep summer summit switzerland tourism trail travel trekking valley view wasserauen schwende appenzeller altenalpturm seealpsee clouds fog sky cloud adventure