Çatak Kaplıcası, in Düzce province, offers thermal water (pH 7.3) distributed across indoor pools, outdoor pools and a sauna, within a steamy atmosphere.
Insider tip — Çatak Kaplıcası (Gorge Spring) in the Düzce province area — 'çatak' means a mountain gorge or confluence of streams, where groundwater springs typically emerge along fault lines. Düzce province, like neighbouring Sakarya, sits on an active seismic zone (the North Anatolian Fault) that generates geothermal activity. The gorge spring serves a forested mountain community on the southern slopes of the Western Black Sea ranges.