Fensu Jeotermal Sondaj Ereğli Şantiyesi in Ereğli, Konya province, is a geothermal drilling site whose thermal steam-water has a pH of 7.3. A steam room with kessa scrub and massage is available here.
Insider tip — Fensu Jeotermal Sondaj Ereğli Şantiyesi — a geothermal drilling company's operations yard near Ereğli, Konya province. 'Jeotermal sondaj' (geothermal drilling) refers to exploratory and production well-drilling for thermal water resources. Ereğli (ancient Cybistra/Heraclea) lies on the Konya Plain; the Ereğli-Akhüyük area hosts geothermal wells operated by the municipality for spa use. Fensu is a private geothermal contractor working the broader Ereğli thermal field — this Foursquare entry marks a commercial drilling site rather than a public thermal bath.