Tidal pools of Leça de Palmeira, Saltwater swimming complex in Leça da Palmeira, Portugal
The Tidal Pools of Leça de Palmeira are a saltwater swimming complex on the Portuguese Atlantic coast, where concrete basins are set directly into natural rock formations. The structure descends in levels from the street down to the water's edge, with changing rooms built underground beneath the poolside.
The complex was designed by architect Álvaro Siza Vieira and finished in 1966, making it one of his earliest built works. Decades later, in 2006, it was classified as a National Monument of Portugal.
The pools draw people from the surrounding area who come to swim in the Atlantic within a setting where concrete and rock meet without a clear boundary. The design blends so naturally into the coastline that it is hard to tell where the built structure ends and the natural rock begins.
Summer months tend to be the best time to visit, as the water is warmer and there are more people around. Wear shoes with a good grip, as the rocks and pool surrounds can get slippery when wet.
Not a single natural rock was removed to build the pools, as Siza Vieira designed the entire layout around the existing stone formations. The shape of each basin was determined by the rock already there, which is why no two basins look alike.
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