While the Matterhorn is the culminating point of the Valtournenche on the south, it is only one of the many 4000 metres summits of the Mattertal valley on the north. Its height is exceeded by four major summits: the Weisshorn (4,505 m), the Dom (4,545 m), the Liskamm (4,527 m) and the second highest in the Alps, Monte Rosa (4,634 m). This section of the Pennine Alps, including the Matterhorn, the Zinalrothorn, the Dent Blanche, the Dent d'Hérens, the Breithorn, the Strahlhorn, the Rimpfischhorn and the Alphubel, concentrates most of western Europe's highest mountains and forms a crown of peaks around Zermatt. The deeply glaciated region between the Matterhorn and Monte Rosa (named Dent Blanche-Matterhorn-Monte Rosa) is listed in the Federal Inventory of Landscapes and Natural Monuments since 1983.