Forty-eight of Switzerland's mountains are above sea in altitude or higher. At , Monte Rosa is the highest, although the Matterhorn () is often regarded as the most famous. Both are located within the Pennine Alps in the canton of Valais, on the border with Italy. The section of the Bernese Alps above the deep glacial Lauterbrunnen valley, containing 72 waterfalls, is well known for the Jungfrau () Eiger and Mönch, and the many picturesque valleys in the region. In the southeast the long Engadin Valley, encompassing the St. Moritz area in canton of Graubünden, is also well known; the highest peak in the neighbouring Bernina Alps is Piz Bernina ().