Rabelo boats near the Dom Luis I Bridge (Luis I Bridge) over the Douro River, UNESCO World Heritage Site, Porto, Norte, Portugal, Europe

rabelo boats douro river porto portugal maritime heritage northern portugal traditional boats scenic river river transport historical landmarks culture travel tourism architecture waterfront riverbank boat tour local cuisine picturesque landscape reflection sunset riverine sightseeing portugal attractions cityscape fishing boats cultural tradition bridge engineering river views nature waterfront activities historical architecture landmarks scenic tourism serene waters classic vessels navigation boat life dockside river cruises port commerce riverside dining travel destinations adventure exploration maritime culture history scenic landscapes river life