The Matterhorn ( , , ) is a mountain of the Alps, straddling the main watershed and border between Switzerland and Italy. It is a huge and near-symmetrical pyramidal peak in the Monte Rosa area of the Pennine Alps, whose summit is high, making it one of the highest summits in the Alps and Europe. The four steep faces, rising above the surrounding glaciers, face the four compass points and are split by the Hörnli, Furggen, Leone and Zmutt ridges. The mountain overlooks the Swiss town of Zermatt in the canton of Valais to the north-east and the Italian town of Breuil-Cervinia in the Aosta Valley to the south. Just east of the Matterhorn is Theodul Pass, the main passage between the two valleys on its north and south sides and a trade route since the Roman Era.