This 1920s pool, which is included on the National Register of Historic Places, is one of the most famous attractions in Coral Gables, and justifiably so. This is the country’s biggest freshwater swimming pool, holding a staggering 820,000 gallons and fed by an underground aquifer. It’s also exceptionally beautiful, inspired by lagoons in Venice and with islands, caves, grottoes, towers and a bridge carved into an old coral rock quarry.