The main event is the Jet d'Eau, a 140-meter water spout that’s visible from almost anywhere around the lake. Expect a simple, impressive landmark rather than a full-day attraction. You can view it for free from the promenade, bridges, or parks on either side of the lake. Up-close boat tours bring you nearer to the spray (you will get wet if the wind is blowing toward you) and often include a quick look at a couple of smaller decorative fountains around the harbor. The whole experience takes 30-90 minutes depending on whether you stay on shore or join a boat. It’s pleasant but not life-changing — think photo stop with nice lake views rather than must-see spectacle.
Best time is late spring through early autumn (May-September) when the fountain runs daily and the weather lets you linger outside. Summer evenings avoid the worst heat and crowds thin out after 6pm. Expect to pay around $0-25 per person: nothing if you walk, roughly $15-25 for a short boat cruise that gets you closer. One honest tip — pick a clear day with decent wind so the spray forms a proper rainbow; skip the overpriced lakeside cafés right by the jet and grab a drink further along the quay instead. If you’re short on time, seeing it from the opposite shore is often just as good and saves the boat fare.
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