Palatinus is Budapest's largest open-air bathing complex, set on the green shores of Margaret Island in the middle of the Danube. Opened in 1919, Palatinus is the city's summer bathing institution, attracting up to 10,000 visitors on hot days. The complex features thermal pools fed by the island's own springs (at 36–52°C), multiple swimming pools including a 50-metre competition pool, a wave pool, water slides, sunbathing terraces, and a children's section. The setting on car-free Margaret Island — surrounded by parkland, jogging paths, and rose gardens — makes Palatinus a genuine destination in itself. The baths are seasonal, typically open May to September.