On Turkey's Aegean coast, in Kuşadası, thermal water emerges at 42°C and feeds indoor and outdoor pools complemented by a sauna. This seaside resort combines thermal relaxation with proximity to the Aegean Sea.
Insider tip — Kusadasi sits on the western Aegean coast of Turkey, where tectonic activity along the Buyuk Menderes graben pushes thermal water to the surface year-round. The springs here reach a comfortable 42°C, ideal after a day touring the nearby ruins of Ephesus. Bathing in the late afternoon lets you catch the golden light over the Aegean while your muscles recover from the cobblestone walking. Bring a cotton pestemal towel — the local mineral-rich water is hard on synthetic fabrics.