At the end of via Garibaldi, turn left and you will arrive close to an elevator, which will bring you at the top of a hill, to a belvedere. From there you can enjoy a nice view of Genova.
Genoa is famous for its aquarium but also for its palaces. When walking via Garibaldi, one can see a lot of them from the outside and from the inside. Some are public places, such as the police station, others are museums, others are private places.
Hotel le Nuvole, residenza d'Epoca
What a place! Nice hotel with very welcoming staff. The room was bright and spacious with air conditioning.
I took the bus, OuiBus, going from Nice to Genova. For €15 you get a comfortable seat, a nice and safe driver during a bit more than 3 hours.