The Dão region , whose eponymous river running through it, is a plain where the bare granite rocks appear through the sandy soil. There is also a part of schist in the flatter more southern and western areas. The Serra de Caramulo protects the Atlantic region , and the mountains of the Serra da Estrela and the Serra da Nave offer some shelter from the winds of the south and west. This means that , in winter, Dão is cold and wet , while in summer it is mild and dry (much more than Bairrada ) . A surprising range as Alfrocheiro grapes ( Caíño Gordo, Albarín Tinto, Bruñal or Baboso Black ) , Tinto Cão, Touriga Nacional and other producing increasingly fruity red and white potenciamente firm and fragrant , very suitable for aging are grown . One of the best farms owned by Quinta da Pellada / Quinta de Saes . Certainly a small area of ??Portugal worth and that will give much to talk about in the coming years.