Just along the south side of the Lake Geneva promenade, Parc de la Grange is a large park which contains a rose garden, a historic mansion and a tree-lined path leading to the nearby Parc des Eaux Vives.
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This park offers promenades and views over the lake of the UN campus and the Palais des Nations. Geneva beach is at the end furthest from the city, on the lakefront.
While many of Geneva's buildings are similar in style to what you would find in French cities, the Mairie of Eaux-Vives is a great example of the typical Swiss architecture you would find in cities like Zürich. If you're interested in modern architecture, also visit Rue Saint-Laurent for "La Clarté", an avant-garde building designed by Le Corbusier in 1931/32 — one of 17 Le Corbusier buildings to be listed on the UNESCO World Heritage List. Another interesting attraction here is the Russian Orthodox Church built 1859-1866 with its golden cupolas.
There are many smaller places where to swim in either the rivers or the lake, but the largest one is Genève Plage (literally "Geneva Beach") at the eastern bank of the lake. It's a nice place to swim, enjoy the sun, play, barbecue, or just hang out.
One of the crowning symbols of Geneva is the monumental Jet d'Eau, a fountain of water pumped 140m into the air. The spectacular plume was once an occasional pressure release for hydro-power generation on the Rhône River, but people liked it so much that in 1891 the city created a permanent pumped fountain. It's beautifully lit at night. Best viewed from a distance — the surrounding half kilometer is soaked with water. However, the more adventurous might want to try the pathway leading right up to the Jet d'eau -- prepare to get enjoyably wet!
Geneva has a nice museum which is worth a visit, especially if you have youth and children.
A small park where people like to spend their lunch break. Located at the bank of Lake Geneva, just as you've crossed over the Mont Blanc bridge to the southern half of the city. In the summer there are many small concerts and funfairs held in the park, especially around at the time of the "city party" Fête de Gèneve. Don't miss the flower decorated clock at the southwestern edge of the park.