Because Puerto de la Cruz has uninviting black-sand beaches, the town commissioned Lanzarote artist César Manrique in 1965 to build Lago Martiánez, a forerunner of today's water parks. It's an immense, and immensely fun, public pool on the waterfront, with landscaped islands, bridges, and a volcanolike fountain that sprays sky-high. The complex also includes several smaller pools and a restaurant-nightclub.
Av. de Colón s/n, Puerto de la Cruz, Tenerife, 38004, Spain