terraced vineyards form the hillsides of portugal`s douro river valley

agricultural alto and are between blue bridge bridgen bridges classified crossing cultural culture destination douro europe european farm field form from grape green harvest heritage hillsides lamego landscape miguel nature one outdoor pedestrian peso plant portugal portugals portuguese real region regua river road rural site sky taken terraced there torga tour tourism tourist train travel trip tua two unesco valley view vila vineyard vineyards wine wineyard world