Hi,
You’ve left out some key details: when do you plan to take this trip? How many days? Are you more into monuments or landscapes? What means of transport will you use?
Venice and the Italian lakes are a no-go in summer: too hot and packed with tourists.
Lake Maggiore is the rainiest region in Italy—best avoided in winter too, but magical in spring... though you’ll need a car. I stopped there last June during a heatwave, but I’m already planning to go back.
Here are a few photos—the first two were taken from our room’s balcony in the afternoon when we arrived and the next morning.


We spent half a day visiting two of the Borromean Islands: the Fishermen’s Island and the (very large) Isola Bella.






We stayed in Baveno, near Stresa. Here’s a sunset photo taken on the panoramic promenade on our way back from the (great) restaurant our hotel recommended.


We only saw a few kilometers along Lake Maggiore, but we found it so romantic! Just to give you an idea, we’re lucky enough to live by Lake Geneva, which we see every day from our windows... but Lake Maggiore is way more beautiful.
I haven’t seen the other Italian Alpine lakes since I was a kid, but they’re on my list now.
As for Venice, I’ll never get tired of it—it’s easy to reach by plane, you get around by vaporetto, there are the islands, the museums, and so many amazing spots once you step off the tourist highways. Just avoid weekends in the city center and take the chance to explore the lagoon and the more local neighborhoods like Dorsoduro or the Arsenale.