Complex sentence: One was on a hill between Tralleis and Nysa; the precinct encompassed a sacred grove, a temple of Plouton and Persephone, and an adjoining cave called the Charonion, after Charon ferryman of the dead.
Split into simpler sentences: One was on a hill between Tralleis and Nysa. Its precinct encompassed a sacred grove, a temple of Plouton and Persephone, and an adjoining cave called the Charonion, after the ferryman of the dead.