A tree house hideout in the northern Italian hillside sounds like the perfect vacation. There's a swimming pool right on the property, so we suggest visiting during the warmer months when you can enjoy the sun. And wine tours through the gorgeous vineyards are always an option in Montferrat, rain or shine (but you should double-check before booking any tours).  Photo 4 of 7 in 7 Breathtaking Tree Houses You Can Actually Rent on Airbnb