Sea of Castile
lake, Portugal-Spain
Quick Summary
The "Sea of Castile" is an artificial lake in Spain, formed by the Entrepeñas and Buendía dams on the Tagus River. This lake covers an area of 51 square miles (132 square km). Castile itself is a historical region in central Spain, meaning "land of castles," and formed the core of the Kingdom of Castile, which was instrumental in uniting Spain in the late 15th and early 16th centuries. The Tagus River, the longest waterway on the Iberian Peninsula, flows through both Spain and Portugal.12
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