Caves Calem, port wine cellars, Porto, Norte, Portugal, Europe

Port Cellars at Porto Ferreira, Porto, Norte, Portugal, Europe

Port Cellars at Porto Ferreira, Porto, Norte, Portugal, Europe

Nightime view across the Duoro River of Porto's south bank, Gaia, housing the cellars of famous Port wine companies, Vila Nova de Gaia, Porto, Norte, Portugal, Europe

Port wine cellar, Vila Nova de Gaia, Oporto, Portugal, Europe

View of Sandeman Winery (Port Wine Cellar) and restaurant at sunset, Vila Nova de Gaia, Porto, Norte, Portugal, Europe

View of Sandeman Winery (Port Wine Cellar) and restaurant at dusk, Vila Nova de Gaia, Porto, Norte, Portugal, Europe

Port tasting in the cellars of port lodge Caves Grahams, Qta do Agro, Vila Nova de Gaia, Oporto, Portugal, Europe

Traditional port barrels in which tawny port is maturing, in cellars of port lodge Ramos Pinto, Av. Ramos Pinto, Vila Nova de Gaia, Oporto, Portugal, Europe

Port casks in the Caves Taylor port producers, cellars of Taylor, Yeatman and Fladgate group, Rua do Choupelo, Vila Nova de Gaia, Oporto, Portugal, Europe

Port wine cellar, Vila Nova de Gaia, Oporto, Portugal, Europe

Port wine maturing in barrels in wine cellars, Vila Nova de Gaia, Porto, Portugal, Europe

Port wine maturing in barrels in wine cellars, Vila Nova de Gaia, Porto, Portugal, Europe

Calem, port winery, Vila Nova da Gaia, Porto, Northern Portugal, Europe

Oak barrels in old port wine cellar

Close up of wooden barrels of Colheita port stacked in a cellar. Port wine production, Porto, Portugal