Hot Springs (Palea Kameni)

This uninhabited volcanic islet rises from the Aegean between Santorini and Thirassia, offering visitors the rare chance to bathe in naturally heated mineral springs warmed by geothermal activity deep beneath the seafloor. The sulfurous waters and striking rust-colored volcanic rocks create an otherworldly bathing experience where you can literally float in warm, mineral-rich thermal pools. A short boat journey from the main islands transports you to this geological wonder that feels like stepping into another world entirely.