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img decoding=”async” src=”https://algarvedailynews.com/images/news2/20890.jpg” alt=”Megalithic site discovered on the banks of the Guadiana river.” width=”160″ style=”margin-right: 10px; margin-bottom: 5px; float: left;” />More than 500 menhirs, some organized in tombs and cromlechs (stone circles such as the famous Stonehenge) have been discovered on the banks of the Guadiana, a few metres from the border with Portugal, and constitute a “unique” site in the Iberian Peninsula.