Jungfrau, well-known Swiss peak (13,642 feet [4,158 m]) dominating the Lauterbrunnen valley and lying 11 miles (18 km) south-southeast of the resort of Interlaken. The scenic mountain separates the cantons of Bern and Valais and is in the Bernese Alps, two other peaks of which (the Finsteraarhorn [14,022 feet] and the Aletschhorn [13,763 feet]) surpass [...]