In which European mountain range will you find the mountains Grassen and Titlis both found between the cantons of Obwalden and Berne?
Grassen The Grassen is a mountain of the Urner Alps, located east of the Titlis in Central Switzerland. The summit is the tripoint between the cantons of Berne, Obwalden and Uri.
Wittenberghorn The Wittenberghorn is a mountain of the Bernese Alps, located on the border between the Swiss cantons of Vaud and Bern. It lies approximately halfway between L'Etivaz (Vaud) and Feutersoey (Bern), south of the Col de Jable.