Alqueva Dark Sky Reserve: 10,000 km² of protected night sky in Portugal's Alentejo
Southern Portugal’s Alentejo region is flat, dry, and almost empty. The largest artificial lake in Western Europe — Alqueva — sits at its center, surrounded by cork oak plains, whitewashed villages, and roughly zero urban light domes. In 2011, the Starlight Foundation (supported by UNESCO, the IAU, and UNWTO) certified a 10,000 km² zone around the lake as the world’s first Starlight Tourism Destination. Fourteen years later, the reserve is still one of the darkest accessible skies in Europe, and one of the easiest to reach. ...