Peso da Régua, known locally as Régua, is a charming city nestled in the Douro Valley of northern Portugal. It's renowned for its scenic vineyards and as the base of the world's oldest demarcated wine region, the Douro DOC, regulated since 1756. The city's history is deeply intertwined with the production of port wine, and it played a crucial role in the trade, with barrels being transported from its banks along the Douro River. Today, visitors can explore its rich heritage through wine tours, river trips, and the Museu do Douro, which delves into the history of wine production in the area.