Douro River Vineyards (sorry, its a snapshot from a moving bus but they were not going to stop so I could take a photograph)
On our Portugal Viking River Cruise, we took an excursion to see one of the local vineyards. As the bus headed north from Pinhao and climbed up from the Douro River valley and right through the heart of the port wine producing vineyards. I was in awe as looked at how these farmers use almost every square foot of ground to grow the grapes. Our tour that day was to the only region that produces muscatel wine.