11 Best Places to Visit in Portugal Before Everyone Else Discovers Them

8. Mértola - An Archaeological Wonder on the Guadiana River

Rising dramatically from the banks of the Guadiana River in the heart of the Alentejo, Mértola stands as one of Portugal's most significant archaeological sites and best-preserved historical towns, yet remains remarkably undiscovered by international tourism despite its designation as a "museum town" where every street reveals layers of Phoenician, Roman, Visigothic, Islamic, and Christian heritage. The town's strategic position at the highest navigable point of the Guadiana River made it a crucial trading post for over two millennia, creating an extraordinary accumulation of archaeological treasures that visitors can explore through a network of museums housed in historical buildings throughout the medieval town center. The remarkable Islamic heritage, including the only mosque in Portugal to survive the Christian Reconquest (later converted into a church while maintaining its original mihrab), provides unique insights into the sophisticated Moorish civilization that flourished here for over 500 years. Excavations continue to reveal new discoveries, from Roman mosaics and Visigothic jewelry to Islamic ceramics and medieval coins, making Mértola a living archaeological laboratory where visitors can often observe researchers at work uncovering Portugal's multi-layered past. The surrounding landscape offers exceptional opportunities for exploring the Guadiana Valley Natural Park, where traditional shepherding continues along ancient transhumance routes, and where the river provides excellent conditions for canoeing, fishing, and birdwatching among pristine Mediterranean vegetation. Local artisans maintain traditional crafts including blacksmithing, pottery, and textile weaving using techniques documented in medieval sources, while family-run restaurants serve dishes that reflect the town's multicultural heritage, featuring recipes that blend Christian, Islamic, and Jewish culinary traditions in ways found nowhere else in Portugal.