Passage 8.7.3
θαύματος δὲ ἔτι πλέονός ἐστιν ἐν Μαιάνδρῳ ζέον ὕδωρ, τὸ μὲν ἐκ πέτρας, περιέχοντος τοῦ ῥεύματος τὴν πέτραν, τὸ δὲ καὶ ἐκ τῆς ἰλύος ἄνεισι τοῦ ποταμοῦ. πρὸ Δικαιαρχίας δὲ τῆς Τυρσηνῶν ὕδωρ τε ἐν θαλάσσῃ ζέον καὶ νῆσος διʼ αὐτό ἐστι χειροποίητος, ὡς μηδὲ τοῦτο τὸ ὕδωρ ἀργὸν εἶναι ἀλλά σφισι λουτρὰ θερμά.
Yet a still greater wonder exists in the Maeander, a boiling water, partly rising from a rock—though the river flows around the rock—and partly emerging from the mud of the river itself. Before Dicaearchia in the land of the Etruscans, there is also boiling water in the sea, and because of this, an artificial island has been constructed, so that even this water is not unused but serves as hot baths for them.