Vintage shot of river boats docked in valley Douro, traditional sight, UNESCO World Heriatge site along the river Douro in Porto, Portugal on a sunny day

vintage shot river boats boats docked valley douro traditional sight world heriatge site unesco river douro porto portugal sunny daytime day riverside river flowing hilly terrain cityscape houses homes 4k water sky summer travel vintage city building architecture old boat europe urban river tourism mediterranean medieval culture sailboat portuguese transport traditional ancient downtown vessel douro outdoors history town historical