You are 2.5 km from the fountain, so basically 20-30' walks from the heart of the city, the old town, the shopping streets. Idealy, you can rent an electric bicycle that will allow you to reach any part of interest in less than 15'. More fun less worry. If you have a car, you can park for free at the door step. There is also the A bus that leaves at your front door every 20-30'. The stop is called Cologny temple. You get off at the terminus, "Rive" witch is the center. Nerver the less, the best is to walk down the hill 5' and you catch the yellow regular boat line that takes you to the center or across.