Gruyères, Switzerland Gruyères is famous for its namesake cheese, whose mild, nutty flavor melts so well in fondue. But few are familiar with the town itself, a medieval hamlet in the upper valley of the Saane River in western Switzerland. A wide, stone-paved street leads up to the magnificent 13th-century Gruyères Castle, with its imposing fortifications and expansive views of the surrounding Alpine foothills.