The Douro River in Portugal is a great way to experience this beautiful country. The Douro River Valley features rambling vineyards and charming native farms along the steep slopes of this valley. This area of Portugal is the world’s oldest wine region and features the city of Salamanca, a UNESCO designated “Golden City.” Experience the city of Porto that is called the “City of Bridges” for its numerous bridges over the Douro River. This sailing is a great wine enthusiast river cruise to experience.