The Alqueva Dam, located in the heart of the Alentejo, is one of Europe’s largest dams. Constructed on the Guadiana River and completed in 2002, it creates the Alqueva Reservoir, Western Europe’s largest artificial lake. The dam plays a crucial role in regional irrigation, water supply, and hydroelectric power generation. Additionally, it supports local tourism and wildlife habitats and exemplifies a completely transformational engineering achievement.