Travel through the Douro River Valley, where the Age of Discovery began, on our brand new 8 day Secrets of the Douro river cruise. Meaning âRiver of Goldâ and now designated a UNESCO World Heritage Site, the Douro was not navigable until a series of dams built in the 1950s and â60s allowed a more controlled flow of the river. On this unforgettable river cruise, youâll travel the Douro aboard our newly built Emerald âStar-Shipâ â the 112 passenger Emerald Radiance. Enjoy stops in Portugal ranging from the World Heritage city of Porto to the Roman settlement of Regua and in Spain - Vega de Terron and Salamanca. Highlights include many of the regionâs best sites and activities: the village of Lamego; pre-historic carvings showcased in the Coa Valley Museum and a day trip to Spainâs Roman city of Salamanca, offering a first-hand look at the seat of the Spanish language and a feel for life in medieval times.