If you have got one day then spend your day exploring Genoa's highlights: the historic Old Town, the Genoa Aquarium, and the scenic Porto Antico. You'll capture the city's essence in a short time. With 2 to 3 days, you can delve deeper into Genoa's attractions. Explore the Old Town, visit museums like Palazzo Ducale and Galata Maritime Museum, stroll along Via Garibaldi with its historic palaces, and savor Ligurian cuisine at local eateries.