Geneva is a compact city whose highlights can be explored in two to three unhurried days, thanks to how close its landmarks sit to one another and how walkable the city is. Here's a practical plan.

Day 1: Jet d'Eau and the lakefront. Start at the Jet d'Eau, Geneva's most famous symbol, originally created in 1886 as a safety valve for a hydraulic factory, then moved to its current harbor location in 1891, and raised to 140 meters in 1951 thanks to a lake pumping station. The fountain shoots 500 liters of water per second at speeds up to 200 km/h — a striking sight visible from across the city. Afterward, walk along the Lake Geneva promenade (Quai du Mont-Blanc), where Mont Blanc itself is visible on clear days.

Day 2: Old Town and St. Pierre Cathedral. Set aside half a day to wander the Old Town (Vieille Ville), with its cobbled lanes and historic squares, ending at St. Pierre Cathedral, where you can climb 157 steps up a narrow spiral staircase to the north tower for a panoramic view of the town, the lake, the Jet d'Eau, and the Alps. Beneath the cathedral lies one of Switzerland's largest archaeological sites, with 5th-century Roman mosaics and remains of early Christian churches. A simple self-guided Old Town walk typically takes two to three hours.

Day 3: The UN quarter. Give half a day to the Palais des Nations, the UN's European headquarters since 1966, built between 1929 and 1936 to house the League of Nations, set within the Parc de l'Ariana overlooking Lake Geneva. The guided tour inside the building lasts about 60 minutes, but allow extra time for security checks and queues. Pair this visit with a short stop at the nearby Place des Nations, home to the famous "Broken Chair" monument symbolizing anti-landmine campaigns.

Bonus stop: the Reformation Wall. If time remains, add a short visit to the Reformation Wall (Monument international de la Réformation) in Parc des Bastions, commemorating the Protestant Reformation that made Geneva a global religious center in the 16th century.

Practical tip: most of these sights sit within reasonable walking distance of each other, and buses and trams connect the UN quarter to the Old Town within minutes if you prefer comfort over a long walk.