Geneva's Jet d'Eau is perhaps the city's most iconic landmark, and also among the world's largest fountains visible as you fly over the city. It's perhaps fitting, given this is Switzerland, that even this most extravagant urban symbol has a practical origin. The original jet, installed in 1886, was a safety valve for a hydraulic power network. (The water that the current jet shoots into the air is from Lake Geneva rather than city water).
Along with the famous Jardin Anglais and its flower clock, the Palace of Nations, and Switzerland's largest contemporary art museum, the jet is one of many sights in Geneva that you can see on travel advisor John Clifford's Stepping Out in Switzerland itinerary. To read more about John's trip and other itineraries to Switzerland, visit AFAR Journeys.