Neptunbad is an Art Nouveau bathhouse in Ehrenfeld, now a sports spa with two sauna worlds. The listed historic wing holds the Jugendstilsauna, a Laconium, the Kaiserbad and a 50 °C Dampfbad; the Asian wing adds an Aufgusssauna at the large pool, a Buddhasauna, a Kerzensauna, a Kräutersauna, a Damensauna and a Sentobad with a cascading onsen and zen garden. Saunas and pools are used textile-free. Open daily 9:00 to midnight, from 31.50 € for three hours.