![Picturesque vineyards and wineries line the banks of the Douro River in Portugal.](https://plcbcontent-plcb002.ocecdn.oraclecloud.com/content/published/api/v1.1/assets/CONTE09DD5F9E27C44D8B4961655403DA973/native/wine-countries-states-and-regions-portugal-1400x600.jpg?channelToken=ae8bcfe34a14444fafcadba1b2fef71e)
![Picturesque vineyards and wineries line the banks of the Douro River in Portugal.](https://plcbcontent-plcb002.ocecdn.oraclecloud.com/content/published/api/v1.1/assets/CONTE09DD5F9E27C44D8B4961655403DA973/native/wine-countries-states-and-regions-portugal-1400x600.jpg?channelToken=ae8bcfe34a14444fafcadba1b2fef71e)
Dão
Named for the Dão River, where most of the vineyards are located, Dão is one of Portugal's most prominent wine regions. Showing appreciation for their key varietal, it's a requirement that at least 20% of Dão wines are made with touriga nacional grapes.