Covo dos Conchos 🏝️ amazing Lake with the waterfall inside.

Covo dos Conchos is a man-made lake in Portugal's Serra da Estrela mountains known for its Bell-mouth spillway. In 1955, the spillway was constructed to move water from Ribeira das Naves to Lagoa Comprida. It is a part of the Serra da Estrela's hydroelectric dam system.