wine. The Dão Wine is produced in a mountainous region with temperate climate, in the area of the Mondego and Dão rivers in the northern region of central Portugal. These mountains protect the castas from maritime and continental influences. Bairrada wine, is produced in the Região Demarcada da Bairrada. The name "Bairrada" comes from the Portuguese word "barro" meaning "clay", due to the clayey soils of the region. Although the region was classified in 1979, it is an ancient vineyard region. The vines grow exposed to the sun, favouring the further maturity of the grapes. The Baga casta is intensely used in the wines of the region. The Bairrada region produces table, white and red wines. Yet, it is notable for its sparkling natural wine. Alentejo wine is produced from grapes planted in vast vineyards extending over rolling plains under the sun which shines on the grapes and ripens them for the production. Some producers of this region still do wine in great potteries as in Roman times. Colares wine is type of wine produced in sandy soils outside Lisbon between the foothills of Sintra and Roca Cape. Because of Lisbon's urban sprawl, the lands available for vineyards became so small, that the demands has always been higher than the production, making it one of the most expensive Portuguese wines. Port Port wine vines need to grow in schist rich soil and require a specific micro-climate. It is produced through a unique vinification method. The red varietals are the most common. The wine is produced in the beautiful landscape of the Douro Valley in Alto Douro region, a region that is classified as World Heritage by UNESCO. The wine is exported from the city of Porto, thus acquiring the name Porto (or "Port" in English-speaking countries). There are several varieties of Port wine: some of the most popular are the Tawny, White, Ruby, and Late Bottled Vintage (L.B.V.). Wine cellars where port wine is stored to mature can be visited all year around in order to get information about the history of Port Wine and the Douro region. Moscatel wines Moscatel is a liqueurous wine from the Setúbal Peninsula. Although the region has produced wines since the dawn of nationality, it was in 1797 that the wines of Setúbal were first mentioned. There is another variety of Moscatel wine, the "Moscatel de Favaios", in the Região Demarcada do Douro, it