Editing Port wine (section)

===Transport===
[[File:Rabelo Douro en–Porto.jpg|thumb|right|''Rabelos'', a type of boat traditionally used to transport barrels of port down the River Douro for storage and aging in caves at Vila Nova de Gaia near Porto]]
[[File:Porto wine barrels (7872306736).jpg|right|thumb|A [[Rabelo boat|barco rabelo]] carrying display port barrels]]

Port is produced from grapes grown in the Douro valley. Until 1986 it could only be exported from Portugal from [[Vila Nova de Gaia]] near [[Porto]], Portugal's second-largest city.<ref name="fp"/>{{rp|492}} Traditionally, the wine was taken downriver in flat-bottom boats called '[[Rabelo boat|barcos rabelos]]', to be processed and stored.<ref name="fp"/>{{rp|305}} In the 1950s and 1960s, several [[hydroelectric power]] dams were built along the river, ending this traditional conveyance. Currently, the wine is transported from the vineyards by [[tanker truck]]s and the ''barcos rabelos'' are only used for racing and other displays.