Genf
Geneva lies at the western end of Lake Geneva, where the Rhône leaves the lake, and is Switzerland's international center. The city combines an Old Town with Reformation history, a lakeside with the 140-meter high Jet d'Eau, and the European seat of the United Nations.The Jet d'Eau, originally a pressure-release valve for a hydropower plant, has been a landmark since 1891. Above the Old Town is Saint-Pierre Cathedral, where John Calvin preached in the 16th century. Its tower offers views over rooftops, the lake, and the Alps. In Parc des Bastions, the Reformation Wall marks Geneva's role as a Reformation center. The Palais des Nations offers hour-long guided tours; CERN researches on the city's outskirts.