The Lago Martiánez is the defining landmark of Puerto de la Cruz — a vast open-air swimming complex designed by the Canarian artist and architect César Manrique. Opened in 1971, it occupies a dramatic stretch of rocky lava coastline along the northern seafront and consists of several interconnected saltwater pools, volcanic rock islands, fountains, and sunbathing terraces.
The design is extraordinary: Manrique used the existing lava formations as natural dividers, kept the rocky coastline largely intact, and created a series of spaces that feel both monumental and intimate. The largest pool can accommodate hundreds of swimmers; the smaller ones are quieter. Admission is reasonable and the complex also has a restaurant and beach bar. Come in the morning when the pools are less crowded and the Atlantic light is at its best.