Take that tree house adventure at one of these rentals near Porto, Portugal. Spend time at these tree house rentals and you will not be disappointed. From their fantastic amenities to their one-of-a-kind structures, these tree houses offer you everything and more. From the Douro Valley to Peneda-Geres National Park, these tree houses are in the perfect location for hiking, biking and plenty more fantastic outdoor activities. Lastly, guests who stay her will enjoy quality facilities and superb natural surroundings.