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

10. Castro Marim - Salt Flats and Flamingo Sanctuaries in the Eastern Algarve

While tourists flock to the Algarve's western beaches, the eastern town of Castro Marim offers a completely different coastal experience centered around vast salt flats, pristine nature reserves, and one of Europe's most important flamingo breeding grounds, all within sight of the Spanish border where the Guadiana River meets the Atlantic Ocean. The Castro Marim and Vila Real de Santo António Marsh Natural Reserve encompasses over 2,000 hectares of salt marshes, lagoons, and traditional salt production areas where ancient harvesting methods create a mosaic of geometric ponds that shift from white to pink to deep red depending on salinity levels and algae growth. These working salt flats, some in continuous operation since Roman times, support not only traditional salt production but also serve as crucial habitat for over 150 bird species, including thousands of flamingos that nest here in one of their few European breeding colonies. The medieval castle of Castro Marim, perched on a hill overlooking the salt marshes, provides spectacular panoramic views over this unique landscape while housing a small museum that chronicles the town's role in Portugal's maritime discoveries and its importance in the medieval defense against Moorish invasions. Visitors can explore the salt flats on foot or by bicycle along designated paths that provide close-up views of traditional salt harvesting, where workers still use wooden rakes and wicker baskets to collect the precious "white gold" that flavored European cuisine for centuries. Local restaurants specialize in dishes that celebrate the marriage of fresh seafood and artisanal salt, while boat tours along the Guadiana River reveal hidden beaches, abandoned watermills, and traditional fishing villages where time seems to have stopped, creating an authentic Algarve experience far removed from the resort developments that dominate the region's western coast.